sinister (adjective) sinister: nasty, menacing
Sinonime: adverse,
apocalyptic,
bad,
baleful, baneful, blackhearted,
corrupt,
deleterious,
dire,
disastrous,
dishonest, disquieting, doomful,
evil,
foreboding,
harmful,
hurtful, ill-boding,
inauspicious, injurious, lowering, malefic,
malevolent,
malign,
malignant,
mischievous,
obnoxious,
ominous,
pernicious,
perverse,
poisonous,
portentous,
threatening,
unfavorable,
unfortunate,
unlucky, unpropitious, woeful
Antonime: benevolent,
kind,
nice