てっきり

て

っ

き

り

Common wordJLPTN2Freq.FrequencyTop 10,000

Meanings

1

adverb

surely; certainly; without a doubt

Used when the speaker was convinced of something that later turned out to be wrong. Often followed by expressions of surprise or disappointment, such as 〜と思った or 〜のに.

てっきり彼かれが来くる

と

思おも

っ

て

い

た

の

に

、

来こ

なかっ

た

。

I was sure he would come, but he didn't.

てっきり今日きょうは休やすみだと思おもって、寝ね坊ぼうしてしまった。

I was certain today was a day off, so I overslept.

Usage patterns

てっきり〈事こと〉だと思おもっていたto have been sure that ~ (but be mistaken)
彼かれはてっきり出しゅっ張ちょうだと思おもっていたが、実じつは休きゅう暇かだった。
I was sure he was on a business trip, but actually he was on vacation.
てっきり〈事こと〉だと思おもったらhaving been certain of something, only to find out otherwise
てっきり雨あめだと思おもったら、晴はれていた。
I was certain it would rain, but it turned out to be sunny.