ETYM as. threát, akin to âthreótan to vex, German verdriessen, Old High Germ. irdriozan, Icel. thrjôta to fail, want, lack, Goth. usthriutan to vex, to trouble, Russ. trudite to impose a task, irritate, vex, Latin trudere to push. Related to Abstruse, Intrude, Obstrude, Protrude.
1. A warning that something unpleasant is immanent.
2. Declaration of an intention or a determination to inflict harm on another.

Also called an attack, any method used to try to breach the security of a network or system.

Threaten