reippaaksi

Reippaaksi is the translative form of the Finnish adjective reipas. In Finnish grammar the translative case, marked by the suffix -ksi, expresses a change of state or becoming something. Therefore reippaaksi means “to become brisk/energetic/cheerful” or “to turn into a brisk person.”

Typically, reippaaksi is used with verbs that denote change of state, such as tulla (to become) or muuttua (to change). Common constructions include tulla reippaaksi and muuttua reippaaksi. It is not an adverb; for describing the manner of an action, the adverb reippaasti is used instead. An example: Hänestä tuli reippaaksi kahden viikon harjoittelun jälkeen, meaning he became energetic after two weeks of training.

Related forms include reipas (the base adjective), reippaus (noun: briskness or energy), and reippaasti (adverb: briskly). The usage of reippaaksi conveys a shift in temperament or energy level, often emphasizing improvement or positive change. In everyday language, reippaaksi appears more often in written narration or in spoken Finnish when describing personal development, changes in mood, or outcomes of training and effort.