Synonyms for slack

noun a noticeable deterioration in performance or quality

noun a stretch of water without current or movement

noun a soft wet area of low-lying land that sinks underfoot

noun the quality of being loose (not taut)

verb make less active or fast

verb become slow or slower

verb make less active or intense

verb become less in amount or intensity

verb cause to heat and crumble by treatment with water

adjective not tense or taut

adjective flowing with little speed as e.g. at the turning of the tide

adjective lacking in rigor or strictness