Nukkui

Nukkui is a Finnish verb form meaning "slept." It is the third-person singular past tense (preterite) form of the verb nukkua, which means to sleep.

In standard Finnish, the infinitive is nukkua, the present tense third-person singular is nukkuu, and the past tense third-person singular is nukkui. The form is used with a singular subject such as hän (he/she). Example: Hän nukkui koko yön. Translation: He/she slept the whole night.

Morphology and orthography: The past tense form nukkui is produced from the stem nukk- by adding the past tense ending -ui, yielding nukkui. The stem features consonant gemination (kk), a common pattern in Finnish verbs, and the ending provides the finite past information. Nukkui is not a noun or adjective; it functions strictly as a finite verb form.

Usage notes: Nukkui appears in narrative prose, reports, and ordinary speech to describe a completed sleeping action in the past for a singular subject. It is distinct from present or other tenses, such as nukkuu (present) or other past-tense forms used with different subjects.

See also: Nukkua, Finnish verbs, Finnish grammar.