derail
v.
1850, in both transitive and intransitive senses, from French dérailler "to go off the rails," from de- (see de-) + railler (see rail, n.1). In general use first in U.S. Related: Derailed; derailing.
〔李〕[de-=to cause away from 使…离开；rail n.铁轨→] vt. cause to run away from the rails 使脱轨