rack (someone's) brain

Translations
ломать голову
I've been racking my brain all day trying to remember where I left my keys.
Я весь день ломаю голову, пытаясь вспомнить, где оставил ключи.
Definitions
To think very hard about something or to try to remember something, often involving intense mental effort.
Words
rack

verb
ломать
someone

pronoun
чейто
s
принадлежность
brain

noun
мозг