Etymology
From Middle English maught, might, miȝt, myght, from Old English maht, meaht, meht, mieht, miht, mæht (“ability, power; strength; virtue”), from Proto-West Germanic *mahti, from Proto-Germanic *mahtiz (“ability, power; force, strength”), from Proto-Indo-European *(me)mógʰe (“to be able to, to have power”), from *megʰ- (“to be able”), corresponding to Germanic *maganą (“to be able, may”) + *-þiz. Equivalent to may + -th.
Cognates
Cognate with Scots micht (“might”), Yola mought (“might”), Dutch macht (“might, power”), German Macht (“might, power”), Luxembourgish Muecht (“authority, might, power”), Yiddish מאַכט (makht, “might, power”), Faroese and Icelandic máttur (“might, strength”), Danish magt (“power; force”), Norwegian Bokmål makt (“power”), Norwegian Nynorsk and Swedish makt (“power; f