Synonyms of rack one's brains in English:

rack one's brains


See definition of rack (or wrack) one's brains (or brain)

phrase

1‘she racked her brains, but there was nothing she could tell him’

SYNONYMS
think hard, put one's mind to something, give much thought to something, concentrate, try to remember, puzzle over something, cudgel one's brains, furrow one's brow
informal scratch one's head