derelict

1 failing to give proper care and attention the guards were judged derelict in their duty Synonyms careless, negligent, disregardful, lax, lazy, neglectful, neglecting, remiss, slackRelated Words heedless, incautious, irresponsible, reckless, wild; unguarded, unwary; forgetful; disregardful, disregarding, inattentive, oblivious, thoughtless, unheeding, unmindful, unthinking; apathetic, disinterested, indifferent, unconcerned, uninterested; delinquent; looseNear Antonyms meticulous, painstaking, punctilious; cautious, chary, circumspect, gingerly, guarded; alert, heedful, heeding, mindful, observant, regardful, regarding, vigilant, wary, watchful; foresighted, forethoughtful, provident, responsible; thinking, thoughtful; concerned, interestedAntonyms attentive, careful, conscientious, nonnegligent

2 left unoccupied or unused an old derelict mansion that was rumored to be haunted Synonyms abandoned, deserted, desolate, disused, forgotten, forsaken, rejected, vacant, vacated, voidRelated Words ignored, neglected, unattended, untended; castaway, cast-off, discarded, jettisoned, junked, refuse, waste; godforsaken, miserable, shabby, wretched; empty, idleNear Antonyms reclaimed, recovered, redeemed, rescued, retrieved, salvaged, saved; reconditioned, rehabbed, rehabilitated, restored; repeopled

an idle worthless person a section of the city that seemed to be frequented mostly by derelicts Synonyms bum, ne'er-do-well, do-nothing, good-for-nothing, no-account, no-good, no-goodnik, slacker, vagrantRelated Words hobo, sundowner [Australian], tramp, vagabond; drifter, roamer, transient; beggar, panhandler; dodger, goldbrick, shirker; gamine, ragamuffin, urchin, waif; drone, idler, lazybones, loafer, slouch, slug, sluggard; down-and-out (or down-and-outer), indigent, pauperNear Antonyms success, winner