also: じゅうじゃく
na-adjective, noun
Describes a person's character or physical constitution as lacking strength, often with a connotation of being overly gentle or yielding. Can imply a lack of masculine vigor when applied to men.
彼は柔弱な性格で、いつも人に流されてしまう。
He has a weak personality and always gets swayed by others.
その男は柔弱で、力仕事には向い
That man is feeble and not suited for physical labor.
The kanji 柔 (soft, gentle) and 弱 (weak) combine to express weakness or lack of strength. The reading にゅうじゃく is the standard on'yomi; じゅうじゃく is a less common variant.