到底 (Toutei) is a Japanese adverb meaning “(cannot) possibly, (not) by any means, (not) at all, utterly”.
Meanings
- adverb(cannot) possibly; (not) by any means; (not) at all; utterly; absolutelywith neg. sentence
Examples
彼の部屋は小奇麗とは到底言えない。
His room is anything but neat.
この本は私にはとうていわからない。
This book is far above me.
あなたの話は到底真実だと思えない。
I can't possibly think your story is true.
Sentences from Tatoeba (CC BY 2.0 FR).