osallistujaa

Osallistujaa is the partitive singular form of the Finnish noun osallistuja, meaning a participant or attendee in an event, study, competition, or other activity. The base word osallistuja comes from the verb osallistua (to participate) with the agent noun suffix -ja. The partitive form osallistujaa is used in sentences where the object is indefinite, not fully counted, or described in a context of ongoing participation.

In Finnish grammar, the singular partitive is used after certain verbs and expressions that require a partitive object, or when the participant is not specified as a definite unit. The related forms include osallistuja (nominative singular), osallistujan (genitive singular), osallistujat (nominative plural), and osallistujia (partitive plural). Distinctions between these forms help signal definiteness, quantity, and grammatical role in a sentence.

Usage examples:

- Kyselyyn osallistujaa pyydettiin vastaamaan kysymyksiin. (A participant was asked to answer the questions.)

- Tutkimukseen osallistujia rekisteröitiin enemmän kuin odotettiin. (More participants were registered for the study than expected.)

- Tapahtumaan osallistujia odotetaan vähintään sataa. (Participants are expected to be at least one hundred.)

Osallistujaa is a neutral, widely used term in Finnish for referring to a single participant in various contexts. It remains interchangeable with osallistuja in nominative contexts, while the partitive form is essential for grammatically correct construction when the object is indefinite or part of ongoing participation.