Kertoo

Kertoo is a term encountered in Finnish language usage and may also be used as a proper noun in some contexts. In standard Finnish, kertoo is the third-person singular present tense form of the verb kertoa, which means "to tell." It is used to describe someone narrating or recounting something, as in Hän kertoo tarinan, meaning “He/She tells a story.” The form reflects the subject rather than functioning as a standalone noun.

As a verb form, kertoo is part of the regular -oa verb conjugation pattern in present tense. It contrasts with other present-tense forms of the same verb, such as kerrot (you tell) and kerron (I tell). The word thus serves both as a grammatical element and, when capitalized, as a potential proper noun.

In addition to its grammatical use, kertoo may appear as a surname or a place name in Finnish-speaking regions, though such uses are relatively uncommon. It is also sometimes adopted in brand, product, or project names to evoke storytelling or narration, without implying any official affiliation.

Phonology-wise, kertoo is pronounced with two syllables, stressing the first: KER-too. In written Finnish, it is typically lowercased in ordinary text, but may be capitalized at the start of a sentence or when used as a title or name.

See also: kertoa (to tell); Finnish verb conjugation.