Derail
来自Big Physics
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mid 19th century: from French dérailler, from dé- (expressing removal) + rail ‘rail’.
wiktionary
From French dérailler(“to go off the rails”).
etymonline
derail (v.)
1850 (Dionysius Lardner, "Railway Economy"), in both transitive and intransitive senses, "cause to leave the rails or run off the tracks; to run off the rails or tracks," from French dérailler "to go off the rails," from de- (see de-) + railler (see rail (n.1)). Related: Derailed; derailing.
