méi​fǎ

unable

没法 (沒法) méi​fǎ
unable verb
to have no way or method to do something

I can't solve this matter either.

at a loss verb
unable to do anything about a situation or having no choice

He insisted on doing it that way, and I couldn't do anything about it.

Frequency

Movie subtitles
26.6 per million appears in 12% of films
Written text
16.4 per million

Sources

Definitions
CC-CEDICT