for the life of you

US /fɔr ðə laɪf əv ju/
UK /fɔr ðə laɪf əv ju/
"for the life of you" picture
1.

مهما حاولت, أبداً

even with the greatest effort; used to emphasize that someone cannot do something

:
I can't remember his name for the life of me.
لا أستطيع تذكر اسمه مهما حاولت.
She couldn't understand why he did it for the life of her.
لم تستطع أن تفهم لماذا فعل ذلك مهما حاولت.