This is the 5091st most frequent Russian word.
мочи
"Мочи" is the imperative form of the verb "мочить," meaning "soak," "wet," or colloquially "take down" (eliminate).
In this context, ‘мочи’ is used as a figurative expression referring to one's stamina or strength to endure.
У него нет мочи терпеть такой стресс.
He cannot endure such stress anymore.
Here, ‘мочи’ is a form of the verb ‘мочить’, meaning 'to soak' or 'to make wet', in an imperative mood.
Не мочи одежду под дождём!
Don't soak your clothes in the rain!
In this instance, the word 'мочи' serves as an imperative form of a slang meaning 'to attack or defeat'.