n'en pouvoir mais

Etymology
is used in its now obsolete sense of "more"; cf. its 🇨🇬 etymon.

Verb

 * 1)  to not be responsible for something
 * 2)  to be unable to take it any longer, to be unable to go on like this
 * 1)  to be unable to take it any longer, to be unable to go on like this