racked one's brains

Verb

form-of participle past

simple past tense and past participle of rack one's brains

Japanese Meaning

「rack one's brains」の過去形および過去分詞形

When confronted with the puzzle, one racked one's brains for hours before finding an answer.

そのパズルに直面したとき、人は答えを見つけるまで何時間も頭をひねった。

Sense（1）

simple past tense and past participle of rack one's brains