Chapter 78The Applicative System: Overview and the Preverb-vs-Applicative Debate

78.1 Definition and valency effect

The three prefixes e- ‘applicative: about, by means of, at’, ko- ‘applicative: toward, together with’, and o- ‘applicative: into, toward a place’ are valency-increasing derivational morphemes that promote a semantically peripheral participant to the status of a direct object, in the sense established for applicative constructions cross-linguistically (Peterson 2007); Bugaeva (2006: 186); Nakagawa (2024: 192). In Ainu, object status means appearing as a bare noun phrase in the argument frame of a transitive or ditransitive verb; there is no case marking by which objecthood can be read off the noun itself, so the test is transitivity and the agreement prefix the verb licenses Bugaeva & Kobayashi (2022: §2); Satō (2008: 96). Each of the three applicatives raises arity by one: an intransitive base (vi, one argument) becomes a transitive (vt, two arguments), and a transitive base becomes a ditransitive (vd, three arguments) Nakagawa (2024: 194); Bugaeva (2006: 188). The person-marking diagnostics of the valency system expose this arity shift: a derived intransitive takes the suffixal S indexes =as and =an, while a derived transitive or ditransitive takes the prefixal A indexes ci= and a= Satō (2008: 96); Nakagawa (2024: 137, 140).

The applied object's semantic range is broader than the canonical benefactive or instrumental applicative found in many languages. Bugaeva's corpus study of Chitose and Saru applicatives maps the three prefixes onto instruments, locations, goals, comitatives, benefactives, malefactives, recipients, sources, themes, content, causes, paths, and purposes Bugaeva (2006: 187–196). Nakagawa's heading 充当接頭辞 gives the core paraphrases as 〜について・〜で以て・〜〈場所〉で (about / by means of / at a place) for e-, and 〜に向かって・〜とともに (toward / together with) for ko-, with o- restricted to 〜〈場所〉へ (toward a place) Nakagawa (2024: 194–199); Satō (2008: 239–245).

The sources do not slice this space identically. Satō's summary groups 手段・着点・場所 (means, goal, location) under e- and o- together and gives ko- as 方向・手段 (direction, means) — extending the instrumental sense to ko- as well Satō (2008: 239–245). Bugaeva's corpus tables place Means-Instrument with e- (13% of its uses) and record no instrument class for ko- Bugaeva (2006: 190); the divergence is one of classification granularity rather than of data.

78.2 The three prefixes at a glance

The table below gives the core semantic range, arity effect, and most frequent applied-object roles in Bugaeva's corpus sample for each prefix; full role distributions and corpus examples are in Chapter 79 (The e- Applicative), Chapter 80 (The ko- Applicative), and Chapter 81 (The o- Applicative). Bugaeva (2006: 190)

The lexical frequency order is ko- > e- > o- Bugaeva (2006: 188). o- is rare in prose and confined largely to verse; Satō similarly marks it uncommon in his pedagogical treatment Nakagawa (2024: 199); Satō (2008: 244).

78.3 Semantic roles of the applied object

Bugaeva's (2006) role classification of the Chitose/Saru corpus sample yields two findings that bear on typological interpretation Bugaeva (2006: 188–196). First, the most frequent role added by e- is Content (39%), followed by Theme-Patient (17%); only at third place do instrument and locative roles appear. Second, 75–96% of e- applied objects across roles derive from intransitive bases, meaning the applicative is introducing a new core object rather than re-encoding a participant that already had an object-like coding Bugaeva (2006: 190–191).

These figures reflect a typological property: most Ainu applicatives are obligatory rather than promotional. In the canonical promotional type, an oblique participant has a postpositional paraphrase that the applicative replaces optionally; in Ainu, the majority of applied objects — especially the Content class of e- — have no independent postpositional frame, so the applicative construction is the only coding available. Bugaeva calls the Content-adding use of e- the most productive class and 'very typical in its atypicality' precisely because it sits outside the promotional prototype Bugaeva (2006: 186–187, 191–196); Bugaeva & Kobayashi (2022: §4.1.1). The cross-linguistic placement of Ainu in applicative typology, drawing on Bugaeva's 2010 comparative study, is taken up in the per-prefix chapters.

For ko-, Addressee (20%), Goal (19%), Comitative (18%), and Benefactive (18%) together account for three-quarters of applied-object tokens; Source and Recipient each contribute 5%, with the remainder across Cause, Range, and Location Bugaeva (2006: 190). The o- distribution is narrowest: locative roles (Goal-into-place 57%, Location 29%, Source/Theme 14%) cover all attested instances, all paraphrasable by ta / un 'at/to' Bugaeva (2006: 191). The role percentages are from a single corpus sample and serve as approximations; no pan-Hokkaido frequency study has been conducted ‹corpus-suggested›.

78.4 The prefix e-: four subtypes

Nakagawa distinguishes four subtypes of e- by the relationship between the applied object and its postpositional paraphrase, where one exists Nakagawa (2024: 195). The classification is reproduced here because it identifies which uses are promotional (subtypes 1–2) and which are obligatory (subtypes 3–4); full analysis and corpus examples are in Chapter 79 (The e- Applicative).

Subtype (3) is where e- functions as a non-causative transitivizer adding a core Theme or Content object with no other syntactic route. The derivation ikka ‘steal (vi)’ → e-ikka 'steal something (vt)' → ko-e-ikka 'steal something from someone (vd)' illustrates the Content-adding step followed by a second applicative layer Bugaeva (2006: 191).

A community-proposed etymology for eykaun ‘surpass, excel’ illustrates the Content / Theme-adding function in a compound form: the verb may derive from e- applicativizing the locative predicate ka un 'be above' → eykaun 'surpass something', with a parallel -u transitivizer yielding the doublet kaunu (nukopoli, aynu-corpora Discord 2024) aynu-corpora Discord (2023–2026). The proposal is consistent with the range of e-'s Content / Theme uses, but the lexical history has not been established in the peer-reviewed literature ‹speculative›.

78.5 The prefix ko- and the contrast with o-

ko- covers the roles associated with an animate or non-spatial goal: Addressee, Goal, Comitative, Benefactive, Malefactive, Recipient, and Source are all represented in Bugaeva's sample Bugaeva (2006: 190); Nakagawa (2024: 197–198). The diagnostic contrast with o- is the type of goal argument: ko- preferentially takes person or animal goals, while o- is restricted to place nouns Nakagawa (2024: 198–199); Bugaeva (2006: 191). The following Chitose minimal pair, with the same base verb ek ‘come (singular)’, demonstrates the distinction:

The comitative reading of ko- ('together with') is transparent when the applied object is incorporated into the verb word:

A community-proposed analysis of sirkokunne ‘pass the night’ illustrates a less common behavior: the form ku=sir-ko-peker may represent ko- inserted inside the compound intransitive sir-peker 'the sky brightens', with the applied object (first person 'I') raised to subject of the whole derived verb, yielding 'I pass the night' (nukopoli, aynu-corpora Discord 2024) aynu-corpora Discord (2023–2026). This object-to-subject raising analysis is not directly addressed in the accessible peer-reviewed sources and is offered as a community-proposed reading of an opaque form ‹speculative›.

78.6 Stacking, productivity, and the feeding relation

Two applicatives may combine on a single verb. The most attested pairing is ko-e- or e-ko-, where each prefix encodes an independent applied object: e-ko-isoytak 'tell stories about something (e-) to someone (ko-)'. Bugaeva and Kobayashi report no visible semantic difference between the two prefix orders in this combination, and Nakagawa gives e-yay-e-isoytak as a further expansion that inserts the reflexive yay- between the two applicatives, treating the whole as one word Bugaeva & Kobayashi (2022: §4.1.1); Nakagawa (2024: 211). The arity ceiling on double applicatives follows from the two-person-affix cap: a verb may carry at most one subject index and one object index, so a third applied object is unindexable without compensatory intransitivization Bugaeva & Kobayashi (2022: §2); Satō (2023: 39). The Handbook illustrates the compensatory strategy in yay-ipe-e-ko-sunke 'eat meagre meals', where three applied-object positions are successively reduced — one object incorporated (ipe 'food'), one reflexivized (yay-) Bugaeva & Kobayashi (2022: §4.1.1). The full range of applicative–reflexive and applicative–causative stacking is in Chapter 82 (Applicative Stacking, Ordering, and the Feeding of Relativization).

Across the lexicon, the applicatives are pervasive: Bugaeva estimates roughly one-third of all verbs are applicative-derived, amounting to up to 7% of the entire Ainu lexicon, and characterizes them as 'productive, ubiquitous, and versatile' Bugaeva (2006: 188). The prefixes attach to almost every verb class, with the exception of meteorological, bodily-process, and certain change-of-state verbs at one extreme of the transitivity hierarchy and effective-action verbs at the other Bugaeva & Kobayashi (2022: §4.1.1). Ijäs's learner grammar surveys transitive and derived forms but does not extend to the applicative prefixes in the banked lessons; the pedagogical description is in Satō's Lesson 31 Ijäs (2023); Satō (2008: 239–245).

A further structural consequence of the applicative system is its role in enabling noun incorporation. Oblique nouns — instruments and locations — cannot incorporate directly: an applicative must first promote them to object status, and only the derived object then incorporates into the verb word Shibatani (1990: 62, 66); Nakagawa (2024: 484). A verb-noun sequence bearing an applicative prefix is therefore a reliable sign that incorporation has occurred: o-tumi-osma (with o-) is unambiguously incorporated, while bare tumi osma is ambiguous Shibatani (1990: 63). When incorporation takes place, the applicative carries the postpositional meaning that would otherwise be expressed by a separate postposition: at-e-uk 'catch with a net' (= at ani uk), pira-ko-hokus-te 'fall toward a cliff' (= pira or un hokuste) Nakagawa (2024: 484). Shibatani (1990) demonstrates that Baker's Case-theoretic prediction — that unaccusative bases are blocked from applicative formation — is falsified in Ainu, which does applicativize unaccusatives Shibatani (1990: 66); (Baker 1988). Kaiser (1998) examines the morphological properties of this interaction in detail Kaiser (1998); the treatment is continued in Chapter 82 (Applicative Stacking, Ordering, and the Feeding of Relativization) and Chapter 88 (Object (Patient) Noun Incorporation).

78.7 Homophonous prefixes and the arity computation

Three surface forms shared with the applicative prefixes carry different arity values and require disambiguation by context and argument counting. Applicative e- (+1) has two homophonous companions: the affiliative e- 'the head/end of' (arity 0), which fills a part slot on the object while requiring a separate possessor, leaving net arity unchanged; and the second-person subject index e=, a person affix rather than a derivational prefix Nakagawa (2024: 192–193); Bugaeva & Kobayashi (2022: §4.3.3). The lexical body-region prefix he- 'head' (arity −1) provides a further contrast, filling the object slot with the subject's own head region. The Chitose pair he-puni 'lift one's own head (vi, −1)' against e-puni 'lift someone's head (vt, +1)' separates applicative from lexical prefix by the person-suffix test Nakagawa (2024: 193). Applicative o- (+1) has a parallel affiliative twin o- 'the bottom/base of' (arity 0). None of these can be glossed without first computing the arity. The full homophony set is in Chapter 73 (Valency, Voice, and Noun Incorporation: Overview); the affiliative morphology is in Chapter 44 (Concept Form vs. Affiliative (Possessed) Form).

78.8 Terminological background

The applicative category was recognized early in Ainu grammaticology. Kindaichi and Chiri (1936) named it 充当相 (applicative voice); Nakagawa notes alongside it Chiri's earlier label 格の関係を表わす接頭辞 (prefixes expressing case relations) Kindaichi & Chiri (1936); Nakagawa (2024: 192–193). The typological rarity of productive applicatives as a grammatical system in Eurasian languages — closest parallels in certain Caucasian languages and Burushaski — was already remarked upon in this early literature and confirmed by Bugaeva's later cross-linguistic survey Bugaeva (2006: 185); Bugaeva (2010). The modern English term 'applicative' and the object-promotion analysis of e-, ko-, and o- are established in Bugaeva (2006, 2010) and consolidated in the Handbook Bugaeva (2006); Bugaeva (2010); Bugaeva & Kobayashi (2022: §4.1.1). Nakagawa's own term 充当接頭辞 follows the same analysis Nakagawa (2024: 192).

Baker's (1988) P-incorporation theory treats applicative formation as preposition/postposition incorporation into the verb, promoting its complement to object; Shibatani (1990) applies this framing to the Ainu data, and its most direct analytical consequence is the feeding-relation account above Shibatani (1990: 65–66); (Baker 1988). The older 'case-relation prefix' terminology and the 'preverb' framing encountered for cognate categories in some other languages do not figure as active analytical positions in the recent Ainu literature: Bugaeva (2006), the Handbook, Nakagawa (2024), and Satō (2008) adopt the applicative analysis consistently, and the terminological variation reflects a historical shift in descriptive vocabulary rather than a substantive analytical disagreement among the current sources Bugaeva (2006: 185–186); Nakagawa (2024: 192–193) ‹consensus›.