1Very; extremely — an adverb indicating a high degree. (とっても is a more emphatic variant of the same word.)
このケーキはとてもおいしい。
This cake is very delicious.
今日はとても暑いから水をたくさん飲んでね。
It's very hot today, so drink plenty of water.
彼女はとっても親切だ。
She is really kind.
2Used before a negative to mean 'not at all' or 'simply cannot' (e.g., とても〜ない).
この仕事はとても私にはできない。
I simply can't do this job.
彼の言うことはとても信じられない。
I simply can't believe what he says.