衰すい耗もう

noun, noun or participle which takes 'suru'

weaken and decline; deteriorate

Describes a gradual loss of strength, vitality, or function, often used for physical or mental decline. Somewhat formal or literary.

• 高こう齢れいになると体たい力りょくが衰すい耗もうする。

  As one ages, physical strength weakens and declines.

• 長ながい闘とう病びょう生せい活かつで気き力りょくが衰すい耗もうした。

  His mental energy deteriorated after a long illness.