From Middle English murder, murdre, mourdre "murder", alteration of earlier murthre (“murder”) (see murther) from Old English morþor (“secret slaying, unlawful killing”) and Old English myrþra (“murder, homicide”), both from Proto-Germanic *murþrą (“death, killing, murder”), from Proto-Indo-European *mrtro- (“killing”), from Proto-Indo-European *mer-, *mor-, *mr- (“to die”). Akin to Gothic 𐌼𐌰𐌿𐍂𐌸𐍂 (maurþr, “murder”), Old High German mord (“murder”), Old Norse morð (“murder”), Old English myrþrian (“to murder”) and morþ.
The -d- in the Middle English form may have been influenced in part by Anglo-Norman murdre, from Medieval Latin murdrum from Old French murdre, from Frankish *murþra (“murder”), from the same Germanic root, though this may also have wholly been the result of internal development (compare burden, from burthen).
- (countable) An act of deliberate killing of another being, especially a human.
There have been ten unsolved this year alone.
- (uncountable) The crime of deliberate killing of another human.
The defendant was charged with .
- (uncountable, law, in jurisdictions which use the felony murder rule) The commission of an act which abets the commission of a crime the commission of which causes the death of a human.
- (uncountable, used as a predicative noun) Something terrible to endure.
This headache is .
- (countable, collective) A group of crows; the collective noun for crows.