1. (v. t.) To utter threats against; to menace; to inspire with apprehension; to alarm, or attempt to alarm, as with the promise of something evil or disagreeable; to warn.

2. (v. t.) To exhibit the appearance of (something evil or unpleasant) as approaching; to indicate as impending; to announce the conditional infliction of; as, to threaten war; to threaten death.

3. (v. i.) To use threats, or menaces; also, to have a threatening appearance.

abuse admonish advise afflict aggrieve alert anticipate apprehend approach augur await be destined be fated be imminent be in store be to be be to come befoul bewitch blight bludgeon bluster bluster out of bode brew browbeat bulldoze bully caution come come on comminate condemn confront corrupt cow croak crucify cry havoc curse damage daunt defile demoralize denounce deprave despoil destroy disadvantage disserve distress do a mischief do evil do ill do wrong do wrong by doom dragoon draw near draw nigh draw on endanger envenom expect face forebode foresee foretell forewarn forthcome gather get into trouble give fair warning give notice give warning hang over harass harm have a premonition have a presentiment hector hex hope hover huff hurt impair impend imperil infect injure intimidate issue an ultimatum jeopardize jinx lie ahead lie over look black look for look forward to look threatening loom lower maltreat menace mistreat molest near notify outrage overhang persecute plan play havoc with play hob with plot poison pollute portend preapprehend predict prejudice presage project prophesy put in jeopardy savage scathe sound the alarm systematically terrorize taint terrorize tip tip off torment torture utter a caveat utter threats against violate warn warn against wound wreak havoc on wrong