N12306/3019

てっきり

adverb

Meanings

surely, certainly, without doubt

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Example sentences

てっきりかれ犯人はんにんだとおもっていたが、ちがった。

I was sure he was the culprit, but I was wrong.

てっきり試験しけん合格ごうかくしたとおもってよろこんでいたのに、じつ不合格ふごうかくだった。

I was absolutely certain I had passed the exam and was overjoyed, but it turned out I had failed.

てっきり会議かいぎ午後ごごだとおもんでいたので、午前中ごぜんちゅうてしまった。

I was completely convinced the meeting was in the afternoon, so I ended up coming in the morning.

彼女かのじょいていたので、てっきりかなしいことがあったのかと心配しんぱいした。

She was crying, so I was sure something sad had happened and I worried about her.

あのみせてっきり閉店へいてんしたとおもっていたが、移転いてんしていただけだった。

I was certain that shop had closed down, but it had merely relocated.