Synonyms of threatening in English:

threatening


See US English definition of threatening

See UK English definition of threatening

See Spanish definition of amenazador

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