Synonyms for threatening

Verb

1. endanger, jeopardize, jeopardise, menace, threaten, imperil, peril, exist, be

usage: pose a threat to; present a danger to; "The pollution is endangering the crops"

2. threaten, warn

usage: to utter intentions of injury or punishment against:"He threatened me when I tried to call the police"

3. threaten, bode, portend, auspicate, prognosticate, omen, presage, betoken, foreshadow, augur, foretell, prefigure, forecast, predict

usage: to be a menacing indication of something:"The clouds threaten rain"; "Danger threatens"

Adjective

1. baleful, forbidding, menacing, minacious, minatory, ominous, sinister, threatening, ugly, alarming (vs. unalarming)

usage: threatening or foreshadowing evil or tragic developments; "a baleful look"; "forbidding thunderclouds"; "his tone became menacing"; "ominous rumblings of discontent"; "sinister storm clouds"; "a sinister smile"; "his threatening behavior"; "ugly black clouds"; "the situation became ugly"

2. heavy, lowering, sullen, threatening, cloudy (vs. clear)

usage: darkened by clouds; "a heavy sky"