Meaning

adjective having or showing great strength or force or intensity; ; ; - Bulwer-Lytton

adverb (Southern regional intensive) very; to a great degree

originFrom Middle English mighty, mightie, mighti, myghty, miȝty, maȝty, from Old English mihtiġ, mehtiġ, meahtiġ, mæhtiġ (“mighty”), from Proto-West Germanic *mahtīg (“mighty”), from Proto-Germanic *mahtīgaz (“mighty”), equivalent to might + -y. Cognate with Scots michty, mychty, Saterland Frisian machtich, Dutch machtig, German Low German machtig, German mächtig, Swedish mäktig.

Etymology from Wiktionary, CC BY-SA 3.0