Slack Antonyms
Slack Antonyms in Adjective Form
- brisk, busy, active, bustling, pressing.
- careful, strict, conscientious, attentive, rigorous.
- tense, tight, taut, inflexible, rigid.
Slack Antonyms in Noun Form
- activity, bustle, rush, exertion, liveliness.
- tension, tightness, tautness, pull, traction.