Dictionary / Vocabulary / 途方に暮れる
とほうにくれる
to be at a loss; to be puzzled
Also written 途方にくれる
君の忠告がなければ、私は途方にくれるだろう。
If it were not for your advice, I would be at a loss.
当たり前が通じなくて途方に暮れる。
I'm not seeing the obvious and am rather puzzled.