Where does “schewage” come from?

schewage (Middle English) comes from Old French escauwage, from Old French escauvinghe, from Middle English shewing, from Old English sċēawung, from Old English -ung, from Proto-Germanic -ungō — -ing, -ion. "Forms gerund nouns from verbs.".

Ancestry of “schewage”, step by step

schewage traces back through two separate lines of ancestry.

via Old French escauwage

StepLanguageWordMeaning
1Old Frenchescauwagescavage
2Old Frenchescauvinghescavage
3Middle Englishshewingpresent participle of shew
4Old Englishsċēawunginspection, contemplation; a showing, spectacle,...
5Old English-ungforming nouns from verbs, denoting verbal action...
6Proto-Germanic-ungō-ing, -ion. "Forms gerund nouns from verbs."

via Anglo-Norman escavage

StepLanguageWordMeaning
1Anglo-Normanescavage—
Every word from Proto-Germanic -ungō →Every word from Old English -ung →Every word from Old English sċēawung →