"derailed" in the verb sense
cause to run off the tracks
"they had planned to derail the trains that carried atomic waste"
2. derail, jump
run off or leave the rails
"the train derailed because a cow was standing on the tracks"
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License