ichidan verb, intransitive verb
become emaciated; waste away; grow thin and worn out
Describes a person or animal becoming extremely thin and weak, often due to illness, starvation, or exhaustion.
長い闘病生活で、彼はすっかり痩せ衰えてしまった。
After a long illness, he became completely emaciated.
栄養不足のため、その犬は痩せ衰えていた。
The dog had wasted away due to malnutrition.