Synonyms and related words :
abrupt, adrift, afloat, alternating, amorphous, arbitrary, beetle-browed, black, black-browed, blue, brooding, broody, cantankerous, capricious, changeable, changeful, chapfallen, cheerless, crabbed, crabby, cranky, crestfallen, crotchety, crusty, curt, dark, dejected, depressed, desolate, despondent, desultory, deviable, disconsolate, disheartened, dismal, dizzy, dour, downcast, downhearted, dumpish, eccentric, erratic, fanciful, fantasied, fantastic, fast and loose, fickle, fitful, flaky, flickering, flighty, flitting, fluctuating, freakish, frowning, giddy, gloomy, glowering, glum, grim, grum, harebrained, huffish, huffy, humorsome, ill-humored, ill-tempered, impatient, impetuous, impulsive, in the doldrums, inconsistent, inconstant, indecisive, infirm, irregular, irresolute, irresponsible, irritable, kinky, long-faced, lowering, lugubrious, maggoty, mazy, melancholy, mercurial, moodish, mopey, moping, mopish, morose, motiveless, mumpish, notional, out of sorts, peevish, petulant, piqued, quirky, rambling, restless, roving, sad, saturnine, scatterbrained, scowling, shapeless, shifting, shifty, short, short-tempered, shuffling, snappish, snappy, spasmodic, spineless, sulking, sulky, sullen, surly, temperamental, testy, touchy, unaccountable, uncertain, uncontrolled, undependable, undisciplined, uneven, unfixed, unhappy, unpredictable, unreasonable, unreliable, unrestrained, unsettled, unstable, unstable as water, unstaid, unsteadfast, unsteady, vacillating, vagarious, vagrant, variable, vicissitudinary, vicissitudinous, volatile, wandering, wanton, waspish, wavering, wavery, wavy, wayward, whimsical, wishy-washy