noun

1. the unlawful and malicious or premeditated killing of one human being by another; also, any killing done while committing some other felony, as rape or robbery
2. ☆ Informal something very hard, unsafe, or disagreeable to do or deal with

Etymology: ME murthir, mordre < OE & OFr: OE morthor, akin to ON morth, Goth maurthr; OFr mordre < Frank *morthr: all ult. < IE *mṛtóm < base *mer- > mortal

transitive verb

1. to kill (a person) unlawfully and with malice
2. to kill inhumanly or barbarously, as in warfare
3. to spoil, mar, etc., as in performance the song was murdered by the singer

intransitive verb