To become haggard, gaunt, or emaciated — to look worn out from illness, worry, or fatigue.
入院してから顔がやつれてしまった。
Since being hospitalized, his face has become gaunt.
最近、仕事のストレスでやつれて見えるね。
You look worn out lately from work stress.
長旅の後で彼はやつれた体つきになっていた。
After the long journey he had become thin and haggard.