絶対だよ！

絶対だよ！

I'm absolutely sure!

絶対(ぜったい)だよ！

Zettai da yo!

絶対 (ぜったい)

absolutely; unconditionally; absolute; unconditional; unmistakable; absoluteness

だ (だ)

be; is; indicates past or completed action; indicates light imperative

よ (よ)

indicates certainty, emphasis, contempt, request, etc.; used when calling out to someone; used to catch one's breath or get someone's attention; yo!

Readings: ゼツ、た.える、た.やす、た.つ

Meanings: discontinue, beyond, sever, cut off, abstain, interrupt, suppress

Readings: タイ、ツイ、あいて、こた.える、そろ.い、つれあ.い、なら.ぶ、むか.う

Meanings: vis-a-vis, opposite, even, equal, versus, anti-, compare