Where does “滅相もない” come from?

滅相もない (Japanese) comes from Japanese も, from Old Japanese も, from Proto-Japonic mə, from Arabic مَن — who?; who.

滅相もない (Japanese): Don't be absurd; That's out of the question; Nonsense; Don't mention it

Definitions

  1. Don't be absurd; That's out of the question; Nonsense; Don't mention it

Ancestry of “滅相もない”, step by step

滅相もない traces back through two separate lines of ancestry.

via Japanese も

StepLanguageWordMeaning
1JapaneseもUsed to form the conjectural form of verbs,...
2Old Japaneseもnon-unique topic marker: also, even
3Proto-Japonicmənon-unique topic marker: also, even, too, as well
4Arabicمَنwho?; who

via Japanese ない

StepLanguageWordMeaning
1Japaneseないhaving that quality, having that state; very much...
2Old Japaneseない—
Every word from Arabic مَن →Every word from Proto-Japonic mə →Every word from Old Japanese も →