bù​néng

cannot

不能 bù​néng
cannot auxiliary
To be unable to; to be incapable of doing something due to external circumstances or lack of ability
must not auxiliary
To be forbidden from; used to indicate that something is not allowed or should not be done.

There is a line you can’t cross.

not reach
To be less than or fall short of a certain amount or extent.
the unskilled
(literary) People with little talent or ability.

Frequency

Movie subtitles
268.9 per million appears in 68% of films
Written text
557.3 per million

Sources