N2 — outside your level filter

Modifies the end of the sentence directly and takes no だ／です, so there are no forms to conjugate.

てっきり

tekkiricertainly (mistakenly assumed to be true)N2adverb

Example sentences2

てっきり雨あめが降ふると思おもっていたのに、晴はれてしまった。

tekkiri ame ga furu to omotte ita noni, harete shimatta.

I was certain it would rain, but it ended up sunny. neutral

てっきり君きみが来くるものだと思おもってたよ。

tekkiri kimi ga kuru mono da to omotteta yo.

I was sure you'd be coming. casual