Etymology

Compare Polish, Latvian zupa, Yiddish זופּ ‎(zup). Likely from the Polish, which is itself from German Suppe, from Old French souppe, sope. Itself from either Middle Low German (cf., e.g., sūpen “to drink; to eat with a spoon,” German saufen “to drink; to booze”) or from Late Latin suppa ‎(“sopped bread”), from Proto-Germanic *supô. Ultimately from the same Proto-Indo-European stem (*seu-, *sū- “juice; moisture”) as the English verb suck.