Breakdown of Huono uni vaikuttaa mielialaan koko päivän.
Questions & Answers about Huono uni vaikuttaa mielialaan koko päivän.
- huono = bad
- uni = sleep
- vaikuttaa = affects / influences
- mielialaan = into (the) mood
- mieliala = mood
- ‑an = illative case (into, to)
- koko = whole / entire
- päivän = (the) day (genitive/accusative singular)
Very literally:
Bad sleep affects into (the) mood the whole day.
Natural English: Bad sleep affects your mood all day.
Huono uni is the subject of the sentence, so it appears in the nominative case (the “dictionary form”):
- Huono uni vaikuttaa … = Bad sleep affects … (subject)
- If uni were an object, then you could see forms like huonoa unta or huonon unen, but here sleep is the thing doing the affecting, not the thing being affected.
So: subject → nominative: huono uni.
The verb vaikuttaa has a special pattern: