Where does “disdainful” come from?

Disdainful comes from Middle English disdain plus the Old English suffix -ful, derived from Proto-Germanic fullaz meaning full, ultimately from Proto-Indo-European pleh₁- meaning to fill.

disdainful (English): Showing contempt or scorn; having a pronounced...

Definitions

  1. Showing contempt or scorn; having a pronounced...

Ancestry of “disdainful”, step by step

disdainful traces back through two separate lines of ancestry.

via English disdain

StepLanguageWordMeaning
1EnglishdisdainA feeling of contempt or scorn; That which is...
2Middle EnglishdisdeynenTo disdain; to scorn something
3Old Frenchdesdeignierto disdain
4Old Frenchdeignierto deign; to condescend
5Latindīgnōto deem worthy, suitable, or fitting
6Latindīgnusappropriate, fitting, worthy, meet, deserving, fit, proper, suitable, becoming
7Proto-Italicdegnos
8Proto-Indo-Europeandḱ-nós
9Proto-Indo-Europeandeḱ-take; perceive

via English ful

StepLanguageWordMeaning
1Englishful

Words derived from “disdainful

Every word from Proto-Indo-European deḱ-Every word from Proto-Indo-European dḱ-nósEvery word from Proto-Italic degnos