Where does “foulmouth” come from?

foulmouth (English) comes from English foul, from Middle English foulen, from Old English fūlian, from Proto-Germanic fūlāną, from Proto-Germanic -āną, from Proto-Germanic -ajaną, from Proto-Indo-European -oyéti, from Proto-Indo-European -yéti — he, she.

foulmouth (English): A foul-mouthed person; one who uses obscene...

Definitions

  1. A foul-mouthed person; one who uses obscene...

Ancestry of “foulmouth”, step by step

foulmouth traces back through two separate lines of ancestry.

via English foul

StepLanguageWordMeaning
1EnglishfoulCovered with, or containing unclean matter;...
2Middle EnglishfoulenTo dirty or foul; to make or become dirty
3Old Englishfūlianto become foul; rot; decay
4Proto-GermanicfūlānąTo become foul; rot; decay
5Proto-Germanic-ānąCreates factitive verbs from adjectives, later...
6Proto-Germanic-ajaną
7Proto-Indo-European-oyétiCreates factitive verbs from adjectives
8Proto-Indo-European-yétiCreates intransitive, often deponent,...
9Proto-Indo-Europeanyé-
10Chichewaiyehe, she

via English mouth

StepLanguageWordMeaning
1EnglishmouthThe opening of a creature through which food is...
2Middle EnglishmouþAlternative form of mouth
3Old Englishmūþmouth, opening, door, gate
4Proto-West Germanic*munþmouth
5Proto-Germanicmunþazmouth
6Proto-Indo-Europeanmen-to think, mind; spiritual activity; to stay,...
Every word from Chichewa iyeEvery word from Proto-Indo-European -yétiEvery word from Proto-Germanic -āną
foulmouth — Etymology, Origin & Word History | Etymology Explorer