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Latin word necator comes from Latin neco
neco (Latin)
(figuratively) I thwart, check. I kill, murder, especially without physical wounding such as by poison or hunger.
necator (Latin)
Murderer, killer "he shall be killed, he shall be murdered". "thou shalt be killed, thou shalt be murdered". (figuratively) "he shall be thwarted, he shall be checked". (figuratively) "thou shalt be thwarted, thou shalt be checked".