suppletionyoudaoicibaDictYouDict[suppletion 词源字典]
"The occurrence of an unrelated form to fill a gap in a conjugation (e.g. went as the past tense of go)", Middle English: from Old French, from medieval Latin suppletio(n-), from supplere 'fill up, make full' (see supply1).[suppletion etymology, suppletion origin, 英语词源]