Where does “relentless” come from?

Relentless comes from English relent plus the suffix -les from Middle English, derived from Old English -lēas meaning without, ultimately from Proto-Indo-European wer- meaning to turn or bend.

relentless (English): Unrelenting or unyielding in severity;...

Definitions

  1. Unrelenting or unyielding in severity;...

Ancestry of “relentless”, step by step

StepLanguageWordMeaning
1EnglishrelentStay; stop; delay; A relenting; To become less...
2Middle EnglishrelentenTo become more fluidous or dissolved; to melt; To...
3Anglo-Normanrelentirto relent
4Latinrĕ-back, backwards
5Latinprōdūcōto lead or bring forth, forward or out
6Latinprō-forward direction, forward movement
7Proto-Italic*pro-pro- see the Latin entry for further meanings
8Proto-Indo-Europeanpro-toward, forward
9Proto-Indo-Europeanpor-to give birth; forward, through; going, passage
10Proto-Indo-Europeanper-before, in front; first; to go through
11Proto-Indo-Europeanpr̥tóspassed , crossed

Words derived from “relentless

Every word from Proto-Indo-European pr̥tós
relentless — Etymology, Origin & Word History | Etymology Explorer