bù​kě​néng

impossible

不可能 bù​kě​néng
impossible adverb
not able to occur, exist, or be done

几乎不可能

zhè jī​hū shì bù​kě​néng de.

This is almost impossible.

cannot adverb
expressing a strong conviction that something is highly unlikely or ruled out

It's impossible that he hasn't reached home yet.

Frequency

Written text
90.4 per million

Sources

Definitions
CC-CEDICT
Frequency data
BCC Corpus (BLCU)