Generally, a tyrant, or otherwise, a person characterized by ruthless aggressiveness.

(historical) Attila, kingly ruler of the tribe of the Huns and vast Eurasian Hunnic Empire and feared enemy of the Roman Empire, from 434 until his death in 453.

plural of entry point for the eye

(idiomatic) To undertake a dangerous action in the service of a group.

(idiomatic, Britain) To become frightened or disturbed.

(idiomatic, archaic) A most worthy person. / (idiomatic) A decent, dependable, unpretentious person.

(idiomatic) To claim or desire something that one cannot have.

(idiomatic) Conclusive action has been taken, so events will proceed in an irreversible manner; the point of no return has been passed; the future is determined; there are no more options.

unofficial / secret

(idiomatic) The best or most desirable among some selection.