Synonyms of sinister

1 Syllable

bad, south, stains, dire, left, stain, grim

2 Syllables

undue, harmful, staining, corrupt, creepier, lurid, creepy, evil, southpaw, snaking, doomful, maligns, woeful, larboard, hurtful, troublous, goner, grimmer, grimmest, loury, malign

3 Syllables

disturbing, injurious, disquieting, mischievous, indirect, sinistral, baneful, miasmatic, maligning, forbidding, dishonest, ominous, blackhearted, obnoxious, portside, upsetting, unlucky, threatening, disastrous, malignant, pernicious, portentous, baleful, malefic, longwinded, lowering, ill-boding, impendent, unsettling, sidelong, adverse, left-handed, lowery, perturbing, lefthanded, poisonous, hopeless, perverse

4 Syllables

deleterious, foreboding, unpropitious, malificent, unscrupulous, precursive, ill-omened, undeserved, minatory, maleficent, bad-natured, inauspicious, unpromising, ambilevous, malevolent, unconscientious

5 Syllables

unhospitable, unfavorable, irremediable, unfortunate, premonitory, comminatory, apocalyptic, exploitative

6 Syllables

circumlocutory