Etymology Explorer › English

Where does “derail” come from?

Derail comes from French dérailler, formed from the prefix dé- (from Latin dis- and ex-) and railler (from Latin rego, meaning to rule or direct, via the diminutive -ulus), originally referring to running off the rails.

derail (English): A device placed on railway tracks causing a train...

Definitions

  1. A device placed on railway tracks causing a train...

Ancestry of “derail”, step by step

StepLanguageWordMeaning
1Frenchdéraillerto derail, be derailed; to be off one's rocker
2Frenchdé-used to make antonyms
3Middle Frenchdés-—
4Latindē-—
5Latindē—
6Latinpostbehind; after, since, besides, except; behind,...
7Latinposteablative singular of postis
8Proto-Italicposti—
9Proto-Indo-Europeanpósti—
10Proto-Indo-Europeanpósafterwards, post; by, at

Words derived from “derail”

  • derailer
  • derailable
  • underailable
Every word from Proto-Indo-European pós →