Where does “unthinkable” come from?

unthinkable (English) comes from English Un-, from Middle English un-, from Old English un-, from Proto-West Germanic un-, from Proto-Germanic un-, from Proto-Indo-European n̥-, from Proto-Indo-European ne — not.

unthinkable (English): Incapable of being believed; incredible;...

Definitions

  1. Incapable of being believed; incredible;...

Ancestry of “unthinkable”, step by step

StepLanguageWordMeaning
1EnglishUn-not
2Middle Englishun-—
3Old Englishun-negation or absence of: un-, non-; bad; forms...
4Proto-West Germanicun-not, un-
5Proto-Germanicun-not, un-
6Proto-Indo-Europeann̥-not, un-
7Proto-Indo-Europeannenot

Words derived from “unthinkable”

Every word from Proto-Indo-European ne →Every word from English Un- →Every word from Proto-Indo-European n̥- →