Where does “foul” come from?

Foul comes from Middle English foulen, from Old French fol, from Latin follis meaning a bellows or bag, ultimately from Proto-Indo-European bʰel- meaning to swell.

foul (English): Covered with, or containing unclean matter;...

Definitions

  1. Covered with, or containing unclean matter;...

Ancestry of “foul”, step by step

StepLanguageWordMeaning
1Middle EnglishfoulenTo dirty or foul; to make or become dirty
2Old Englishfūlianto become foul; rot; decay
3Proto-GermanicfūlānąTo become foul; rot; decay
4Proto-Germanic-ānąCreates factitive verbs from adjectives, later...
5Proto-Germanic-ajaną
6Proto-Indo-European-oyétiCreates factitive verbs from adjectives
7Proto-Indo-European-yétiCreates intransitive, often deponent,...
8Proto-Indo-Europeanyé-
9Chichewaiyehe, she

Words derived from “foul

Every word from Chichewa iyeEvery word from Proto-Indo-European -yétiEvery word from Proto-Germanic -āną