at (someone's) wits' end

Translations
на грани отчаяния
After trying everything to calm the baby, she was at her wits' end.
Попробовав все, чтобы успокоить ребенка, она была на грани отчаяния.
Definitions
To be so worried, confused, or annoyed by something that you do not know what to do next; to have no more patience, ideas, or solutions left.
Words
wits

noun
ум