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WordNet-Online
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Adjective slack has 4 senses
- loose, slack - not tense or taut; "the old man's skin hung loose and gray"; "slack and wrinkled skin"; "slack sails"; "a slack rope"
Antonym: tense (indirect, via lax)
- flaccid, lax, limp, slack - lacking in strength or firmness or resilience; "flaccid muscles"; "took his lax hand in hers"; "gave a limp handshake"; "a limp gesture as if waving away all desire to know" G.K.Chesterton; "a slack grip"
Antonym: strong (indirect, via weak)
- slack - flowing with little speed as e.g. at the turning of the tide; "slack water"
Antonym: running (indirect, via standing)
- lax, slack - lacking in rigor or strictness; "such lax and slipshod ways are no longer acceptable"; "lax in attending classes"; "slack in maintaining discipline"
Antonym: diligent (indirect, via negligent)
Noun slack has 5 senses
- slack - dust consisting of a mixture of small coal fragments and coal dust and dirt that sifts out when coal is passed over a sieve
--1 is a kind of debris, dust, junk, rubble, detritus
- slump, slack, drop-off, falloff, falling off - a noticeable deterioration in performance or quality; "the team went into a slump"; "a gradual slack in output"; "a drop-off in attendance"; "a falloff in quality"
--2 is a kind of deterioration, decline in quality, declension, worsening
- slack - a stretch of water without current or movement; "suddenly they were in slack water"
--3 is a kind of stretch
- slack, slackness - the condition of being loose (not taut); "he hadn't counted on the slackness of the rope"
--4 is a kind of looseness, play
- slack - a cord or rope or cable that is hanging loosely; "he took up the slack"
--5 is a kind of cord
Verb slack has 8 senses
- slack - avoid responsibilities and work, be idle
--1 is one way to fiddle, shirk, shrink from, goldbrick
Sample sentence:
Somebody ----s
- slack - be inattentive to, or neglect; "He slacks his attention"
--2 is one way to neglect
Sample sentence:
Somebody ----s something
- slack - release tension on; "slack the rope"
--3 is one way to loosen, loose
Sample sentences:
Somebody ----s something
Something ----s something
- slack, slacken, slack up, relax - make less active or fast; "He slackened his pace as he got tired"; "Don't relax your efforts now"
--4 is one way to decrease, lessen, minify
Sample sentences:
Somebody ----s something
Something ----s something
- slow, slow down, slow up, slack, slacken - become slow or slower; "Production slowed"
--5 is one way to weaken
Sample sentences:
Something ----s
Somebody ----s
- slake, abate, slack - make less active or intense
--6 is one way to decrease, lessen, minify
Sample sentences:
Somebody ----s something
Something ----s something
- abate, let up, slack off, slack, die away - become less in amount or intensity; "The storm abated"; "The rain let up after a few hours"
--7 is one way to decrease, diminish, lessen, fall
Sample sentence:
Something ----s
- slack, slake - cause to heat and crumble by treatment with water; "slack lime"
--8 is one way to hydrate
Sample sentence:
Somebody ----s something
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