ichidan verb, intransitive verb
become haggard; become gaunt; become worn out
Describes a person's appearance becoming thin, tired, and worn down, typically from illness, worry, or overwork. Often used in the past tense やつれた to describe a current state.
長い闘病生活で彼はすっかりやつれてしまった。
He became completely haggard from his long illness.
心配事が続いて、最近やつれた顔をしている。
With all his worries lately, he has a worn-out look on his face.