Chapter 81The o- Applicative

81.1 Applied-object roles and the place restriction

The prefix o- ‘applicative: into/toward a place’ belongs to the applicative series together with e- ‘applicative e-’ and ko- ‘applicative ko-’; an overview of all three and their place in the arity calculus is given in Chapter 73 (Valency, Voice, and Noun Incorporation: Overview). Its function is to promote a place-denoting noun into the verb's argument set as a direct object, raising arity by one: a base intransitive becomes transitive and a base transitive becomes a ditransitive Nakagawa (2024: 198–199); Bugaeva (2006: 186–188). The applied object of o- is always a spatial noun — a goal, a location, or a source — never an animate participant, which separates it from ko- Nakagawa (2024: 198–199); Bugaeva (2006: 191).

Bugaeva's corpus study of the Chitose and Saru dialects supplies a role breakdown for the applied objects of o- Bugaeva (2006: 191). All three categories resolve to postpositional expressions in ta 'at/to' or or un 'into', making o- the only applicative whose applied object is consistently paraphrasable by a locative postposition. The intr-base column records how many forms in each role class derive from an intransitive base.

The role figures are drawn from a single Chitose/Saru corpus sample; no pan-Hokkaido frequency study has been conducted ‹corpus-suggested›. They are consistent with the claim, made by Nakagawa on the basis of text distributions, that o- is the rarest of the three applicatives and occurs predominantly in verse rather than prose or conversational registers Nakagawa (2024: 199); Satō (2008: 244). Bugaeva's lexical frequency order is ko- > e- > o- Bugaeva (2006: 188). The register observation is older than either treatment: Fukuda already set o- aside as frequent in 伝承文学や歌 (oral literature and song) but rare in conversation, surviving there only in a handful of 化石化した形式 (fossilized forms) Fukuda (1956: fn. 16).

The Source row of the table has lexicographic backing in Nakagawa's own dictionary: the entry for the prefix gives 〜〈場所〉へ・〜〈場所〉に・〜〈場所〉から (to / at / from a place), interchangeable with the postposition un Nakagawa (1995). The ablative から sense is thus registered by Nakagawa himself, against the narrower goal-and-location-only formulation that Bugaeva reports from his earlier work Bugaeva (2006: 191); the place restriction is unaffected — all three senses take place nouns only.

81.2 The place restriction: spatial goals versus animate goals

The restriction of o-'s applied object to place nouns gives rise to a minimal contrast with ko- that is most sharply illustrated by the two applicatives on the same base verb. With ek ‘come (singular)’, the difference in applied object type triggers the choice of prefix: the place goal takes o-, the animate goal takes ko- Nakagawa (2024: 198–199); Bugaeva (2006: 191). The full minimal pair and its analytical discussion are in Chapter 78 (The Applicative System: Overview and the Preverb-vs-Applicative Debate).

The same pattern holds for other motion verbs. Adding o- to arpa ‘go’ yields o-arpa 'go to [a place]', a derived transitive whose place-goal applied object is paraphrasable as X or un arpa 'go toward X (a place)' or X ta arpa 'go to X' Nakagawa (2024: 195). The prefixal A index confirms the arity shift to transitive:

81.3 Lexicalized forms and productive use

Within the attested inventory, a set of motion-verb derivatives stand as effectively lexicalized transitive verbs: o-arpa ‘go to a place’, o-ek ‘come to a place’, and o-omante ‘send away to a place’ are all derived by o- applicativization of the corresponding intransitive base and carry a stable spatial-goal reading. Their frequency in verse texts is higher than the productive applicative uses; Nakagawa's observation that o- is a 'mostly verse' prefix reflects this asymmetry rather than a blanket restriction on productive application Nakagawa (2024: 199).

A community-proposed morphological analysis illustrates the o- prefix in a lexicalized nominal form. The noun aoypep ‘dish, food vessel’ is analyzed as a=o-ipe-p, in which the fourth-person agent a=, the applicative o-, the verb ipe ‘eat’, and the agent nominalizer -p combine to yield 'the thing one eats from / into which one eats' (nukopoli, aynu-corpora Discord, December 2024) aynu-corpora Discord (2023–2026). In this reading, o- promotes the container from a locative adjunct to the direct object of ipe, and the whole applicative clause is then nominalized to name the vessel. Tamura's Saru dictionary enters aoypep 'food vessel' without morphological decomposition Tamura (1996); the proposed analysis is consistent with the semantic range of o- but is not established in the peer-reviewed sources ‹contested›.

81.4 The verb o, the affiliative o-, and disambiguation by arity

Three distinct elements share the surface form o- and require the arity computation for disambiguation. The applicative prefix o- adds one argument (arity +1). The affiliative o- 'the bottom/base of' (arity 0) fills a body-part slot while retaining its own possessor, leaving net valency unchanged; the full homophony set is discussed in Chapter 78 (The Applicative System: Overview and the Preverb-vs-Applicative Debate). The third element is the lexical verb o ‘go into, be placed in’, which is already a two-argument form in its base: the theme (the thing moved or placed) fills the A index position and the destination place fills the O index position Nakagawa (2024: 212–213).

Ijäs describes o / oma as a 'special locative-transitive' in which the subject is the thing placed and the object is the place, and identifies the causative form omare ‘put something into a place’ as the means of adding an external putter to the argument frame Ijäs (2023) ‹consensus›. Nakagawa's analysis agrees: omare (= oma-re) is a three-argument ditransitive derived from the two-argument base by the productive causative suffix -re, which promotes the theme argument to object and introduces the agent as the new subject Nakagawa (2024: 212–213). The corpus attests the base verb o with a place-denoting direct object:

A community-proposed etymology treats the alternant oman ‘go in, enter’ as oma-n, where -n is an intransitivizing suffix parallel to other motion-verb formations (nukopoli, aynu-corpora Discord, May 2026) aynu-corpora Discord (2023–2026). The proposal connects oman to the base form o and is consistent with the known -n / -p alternations on motion verbs, but it has not been assessed in the peer-reviewed literature ‹speculative›.

The practical disambiguation test is the arity read-off: if an intransitive base acquires a prefixal A index after a preceding o--shaped element, the element is the applicative (+1); if the verb is already two-argument in its base form and the o-initial sequence is the whole predicate, the element is the verb root; if arity is unchanged and the associated noun is a possessively construed body-part, the element is the affiliative (0) Nakagawa (2024: 137, 140, 192–193); Bugaeva & Kobayashi (2022: §2).

81.5 Noun incorporation and allied spatial operators

Oblique place nouns cannot incorporate into the verb word directly; an applicative must first promote them to object status, and the derived object then becomes incorporable. For spatial goals and locations, o- performs this promotion. Shibatani's word-hood test shows the result: o-tumi-osma is unambiguously one incorporated word, because the applicative prefix could not attach to a bare noun, while tumi osma 'the war began' is structurally ambiguous between a phrasal and an incorporated reading Shibatani (1990: 63). The Mirror Principle ordering places the applicative inside and the incorporated noun outside, mirroring the syntactic derivation Shibatani (1990: 70–71). The interaction between applicatives and noun incorporation is developed in Chapter 78 (The Applicative System: Overview and the Preverb-vs-Applicative Debate) and in Chapter 88 (Object (Patient) Noun Incorporation).

A set of spatial verbs that independently select a place noun as a core object — including otke ‘put, place at’ and kamu ‘cover’ — presents cases where the applicative and causative morphology interact with the verb's spatial argument structure. Kobayashi (2020) examines these interactions for otke and kamu specifically and argues that the argument-structural properties of the place-denoting participant determine which valency-increasing operation is available Kobayashi (2020). These verbs and the broader spatial valency alternations are taken up in Chapter 82 (Applicative Stacking, Ordering, and the Feeding of Relativization).