Synonyms of threatening in English:

threatening


See definition of threatening

adjective

1‘her mother had received a threatening letter’

SYNONYMS
menacing, intimidating, bullying, frightening, terrifying, scary, fearsome, mean-looking, alarming, forbidding, baleful
warning, admonitory, cautionary
rare minacious, minatory, minatorial, comminatory

2‘banks of threatening clouds were building up’

SYNONYMS
ominous, glowering, brooding, sinister, menacing, black, thunderous, dark, wintry, gloomy, heavy, dire, ill, evil, baleful, forbidding, doomy, ugly, unpromising, portentous, foreboding, unpropitious, pessimistic, inauspicious, unfavourable, unlucky, ill-fated, dangerous
archaic direful
rare minacious