derail

[ dee-reyl ]

verb (used with object)

1. to cause (a train, streetcar, etc.) to run off the rails of a track.
2. to cause to fail or become deflected from a purpose; reduce or delay the chances for success or development of:

   Being drafted into the army derailed his career for two years.

verb (used without object)

1. (of a train, streetcar, etc.) to run off the rails of a track.
2. to become derailed; go astray.

noun

1. a track device for derailing rolling stock in an emergency.

derail

/ dɪˈreɪl /

verb

1. to go or cause to go off the rails, as a train, tram, etc

noun

1. Also calledderailer a device designed to make rolling stock or locomotives leave the rails to avoid a collision or accident

Derived Forms

• deˈrailment, noun

Word History and Origins

Origin of derail¹

First recorded in 1840–50; from French dérailler, equivalent to dé- negative prefix + -railler, verbal derivative of rail “bar, beam” (from English ); de- rail ¹

Example Sentences

But would Republicans, who just saw their leader sweep every battleground state and narrowly win the popular vote, be willing to derail a second Trump presidency — and invite his rage — by actually denying him one of his most important cabinet picks?

From Salon

The Azerbaijani president's comments are unlikely to derail talks behind the scenes, which are largely about getting more cash for poorer countries to help implement their climate plans.

From BBC

“It was a time of intense deregulation of a heavily polluting industry and efforts to derail clean-air and water protections,” said Adrian Martinez, senior attorney with Earthjustice.

From Los Angeles Times

Such garden variety mishaps are common, and not expected to derail California’s election process, even as heated rhetoric and attempts to interfere with vote certification ratchet up across the country.

From Los Angeles Times

"This doesn't derail our start to the season. I'm proud as punch because the players put it all out there."

From BBC

Related Words

• block
• deter
• filibuster
• hamper
• hinder
• impede
• interfere
• stall
• stonewall
• thwart