Derail

v. t.

1.

To cause to run off from the rails of a railroad, as a locomotive. [imp. & p. p. Derailed ; p. pr. & vb. n. Derailing.]

Verb	1.	derail - cause to run off the tracks; "they had planned to derail the trains that carried atomic waste"
	2.	derail - run off or leave the rails; "the train derailed because a cow was standing on the tracks" Synonyms: jump

counteract, countermine, derailment, sabotage, subvert, undermine, weaken