derailment

[ dee-reyl-muh nt ]
/ diˈreɪl mənt /
|

noun

the act or process of derailing.

Origin of derailment

1940–45; derail + -ment, or < French déraillement
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for derailment