glaive (v.)youdaoicibaDictYouDict[glaive 词源字典]
late 13c., used in Middle English of various weapons, especially ones with a long shaft ending in a point or an attached blade, from Old French glaive "lance, spear, sword" (12c.), also figuratively used for "violent death," probably from Latin gladius "sword" (see gladiator); influenced by Latin clava "knotty branch, cudgel, club," related to clavus "nail."[glaive etymology, glaive origin, 英语词源]
necro-youdaoicibaDictYouDict
before vowels, necr-, word-forming element meaning "death, corpse, dead tissue," from Latinized form of Greek nekros "dead body, corpse, dead person," from PIE *nek- (1) "death, natural death" (cognates: Sanskrit nasyati "disappears, perishes," Avestan nasyeiti "disappears," nasu- "corpse," Old Persian vi-nathayatiy "he injures;" Latin nex, genitive necis "violent death, murder" (as opposed to mors), nocere "to harm, hurt," noxius "harmful;" Greek nekus "dead" (adj.), nekros "dead body, corpse;" Old Irish ec, Breton ankou, Welsh angeu "death").
pernicious (adj.)youdaoicibaDictYouDict
early 15c., from Middle French pernicios (13c., Modern French pernicieux) and directly from Latin perniciosus "destructive," from pernicies "destruction, death, ruin," from per- "completely" (see per) + necis "violent death, murder," related to necare "to kill," nocere "to hurt, injure, harm," noxa "harm, injury" (see noxious). Related: Perniciously; perniciousness.
quell (v.)youdaoicibaDictYouDict
Old English cwellan "to kill, murder, execute," from Proto-Germanic *kwaljanan (cognates: Old English cwelan "to die," cwalu "violent death;" Old Saxon quellian "to torture, kill;" Old Norse kvelja "to torment;" Middle Dutch quelen "to vex, tease, torment;" Old High German quellan "to suffer pain," German quälen "to torment, torture"), from PIE root *gwele- (1) "to throw, reach," with extended sense of "to pierce" (cognates: Armenian kelem "I torture;" Old Church Slavonic zali "pain;" Lithuanian galas "end," gela "agony," gelti "to sting;" see ballistics). Milder sense of "suppress, extinguish" developed by c. 1300. Related: Quelled; quelling.