FluentPlex

derail

/ˌdiˈɹeɪl/ noun C1
  1. Synonym of derailer: A device placed on railway tracks in order to cause a train to derail. · The derail was placed deliberately so that the train would fall into the river.
  2. An instance of diverting a conversation or debate from its original topic.

Plural derails

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Words, meanings, pronunciations and translations from Wiktionary (CC BY-SA 4.0); how common each word is from wordfreq. Made into this dictionary by FluentPlex.