noun
Refers to physical slack in ropes, belts, or mechanical parts, or metaphorical looseness in discipline or attention. Compare たるみ for sagging or drooping slackness.
See also: 弛み (たるみ)
ロープの緩みを取ってください。
Please take up the slack in the rope.
気の緩みが事故につながる。
A lapse in attention can lead to an accident.
弛み (たるみ) refers to sagging or drooping slackness, often of skin or fabric, while 緩み (ゆるみ) is more general physical or metaphorical looseness.
Noun form of the verb 緩む (ゆるむ, 'to loosen'). The kanji 緩 carries the meaning of loose or slack.