Gotten
来自Big Physics
Middle English: from Old Norse geta ‘obtain, beget, guess’; related to Old English gietan (in begietan ‘beget’, forgietan ‘forget’), from an Indo-European root shared by Latin praeda ‘booty, prey’, praehendere ‘get hold of, seize’, and Greek khandanein ‘hold, contain, be able’.
wiktionary
Morphologically got + -en.
etymonline
gotten
a past participle form of get, showing vestiges of the Old English form of the verb. With adverbs, "obtained or acquired" (in some specified manner) from mid-14c.
