とても~ない

JLPT Level: N3
Meanings

not at all

cannot ~ at all

too ~ to ~

Usage

とても~ない

Explanation
とても before an adjective or verb in the ない form to emphasize that the action is impossible or the circumstance is extreme. It expresses a strong negation, more forceful than simply ~ない. It is used in situations where the speaker wants to convey that something is beyond possibility or completely unachievable given the degree stated.
とても難しくて、解けない。
とてもむずかしくて、とけない。

It's so difficult that I can't solve it.

とても高くて、買えない。
とてもたかくて、かえない。

It's so expensive I can't buy it.

とても忙しくて、休日は取れない。
とてもいそがしくて、きゅうじつはとれない。

I'm so busy that I can't take a day off.

とても眠くて、起きられない。
とてもねむくて、おきられない。

I'm so sleepy I can't get up.

とても小さくて、見えない。
とてもちいさくて、みえない。

It's so small that I can't see it.