1. (n.) Small coal; also, coal dust; culm.

2. (n.) A valley, or small, shallow dell.

3. (superl.) Lax; not tense; not hard drawn; not firmly extended; as, a slack rope.

4. (superl.) Weak; not holding fast; as, a slack hand.

5. (superl.) Remiss; backward; not using due diligence or care; not earnest or eager; as, slack in duty or service.

6. (superl.) Not violent, rapid, or pressing; slow; moderate; easy; as, business is slack.

7. (adv.) Slackly; as, slack dried hops.

8. (n.) The part of anything that hangs loose, having no strain upon it; as, the slack of a rope or of a sail.

9. (a.) Alt. of Slacken

10. (v. t.) Alt. of Slacken

Laodicean Micawberish Olympian Paphian abandon abate abatement abeyant aloof ambling anemic apathetic asthenic backward bagging baggy bate beat-up bedraggled behindhand benumbed blah blase bloodless blow out blowzy bone-lazy bones cadging careless cataleptic catatonic cautious chaff chambering chicken chintzy choke circumspect claudicant coal dust comatose comb coom cowardly crawling creeping creeping like snail culm culpably negligent cut dallying damp dangling dead deadwood debilitated decline decrease delay delaying deliberate delinquent derelict desensitized detached diffuse dilapidated dilatory dillydallying diminish diminution dishwater disinterested disjoin disperse disregardful do-nothing dodge dog it doless dopey dormant douse down downturn drabbletailed draff draggled draggletailed dregs dronish drony drooping droopy duck duck duty dull dust dwindling ease ease off ease up easy easygoing effete ergophobic etiolated extinguish faineant faint faintish faltering feeble filings flabby flaccid flagging flapping flat floppy foot-dragging foul free frowzy frumpish frumpy garbage gash gentle get out of give goldbrick gone good-for-nothing goof off gradual groggy grubby gutless halting hanging heartless heavy hebetudinous hobbling hogwash hopeless husks idle imbecile impotent imprecise in a stupor in abeyance in rags in suspense inactive inactivity inadvertent inattentive indifferent indolent inert infirm informal insouciant jump lackadaisical laggard lagging laissez-faire languid languorous latent lax lazy leaden leave leave loose ends leave undone leavings lees leisurely lenient lessening let alone let be let dangle let down let go let loose let up let up on lethargic lifeless light limber limp limping lingering listless logy loitering loose loose-moraled loosen looseness lull lumbering lumpen lustless malinger marrowless messy miss mitigate moderate mussy neglect neglectful neglecting negligent nerveless nonaggressive nonchalant noninterfering nonrestrictive not pull fair numb numbed of easy virtue of loose morals off off-guard offal offscourings omit orts otiose out overindulgent overly permissive overpermissive parasitic parings pass over pass up passive pause permissive phlegmatic pithless play