derail
1. [ verb ] cause to run off the tracks
Examples:

"they had planned to derail the trains that carried atomic waste"

Related terms: sabotage derailment
2. [ verb ] (transportation) run off or leave the rails
Synonyms: run_off_the_rails jump
Examples:

"the train derailed because a cow was standing on the tracks"

Related terms: travel derailment
Similar spelling:   dearly