1. menace, threat, danger

usage: something that is a source of danger; "earthquakes are a constant threat in Japan"

2. threat, warning

usage: a warning that something unpleasant is imminent; "they were under threat of arrest"

3. threat, declaration

usage: declaration of an intention or a determination to inflict harm on another; "his threat to kill me was quite explicit"

4. terror, scourge, threat, person, individual, someone, somebody, mortal, soul

usage: a person who inspires fear or dread; "he was the terror of the neighborhood"

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See also: threat (Dictionary)