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

Even a delay in appointments can derail ongoing investigations and regulatory efforts.

From The Daily Beast

But he cautioned that last-minute snags could still derail an agreement.

From The Daily Beast

Is he rejecting her, or rejecting her cautionary tale—unable to derail his destiny?

From The Daily Beast

But let me be clear: if this Congress sends me a new sanctions bill now that threatens to derail these talks, I will veto it.

From The Daily Beast

Used optimally, carbs can enhance your fitness regimen—not derail it!

From The Daily Beast

He testified that he had kept the detective agencies informed as to the progress of the plot to derail the train.

From Project Gutenberg

To derail a train is legitimate warfare, with many precedents to support it.

From Project Gutenberg

An engine, moreover, that had the power of leaving the metals to chase you should you not derail it.

From Project Gutenberg

Something told Gladys that the men had had no business at the switch; that they meant to derail and wreck the Limited.

From Project Gutenberg

But, for that matter, he would derail what he liked, and cross where he pleased.

From Project Gutenberg

Related Words

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