noun, noun or participle which takes 'suru', intransitive verb, noun which may take the genitive case particle 'no'
weakness; debility; prostration
Refers to a state of physical or mental weakening, often due to illness, exhaustion, or age. Can be used as a noun, a suru-verb (to become weak), or an adjective.
長い闘病生活で体が衰弱した。
His body weakened after a long illness.
衰弱した高齢者には十分な栄養が必要だ。
Debilitated elderly people need adequate nutrition.