Baretti: A dictionary of the English and Italian languages
Soperchiá-re, v. n.
1. to surpass, excel, exceed, predominate, overcome. Quando l'umido soperchia nel corpo, genera indigestione, where the humid predominates in the body, it causes indigestion; 2. to have more than enough, to have some to spare. Se ve ne soperchiasse qualche poco, datelo a me, if you have any left, give it me. Dispendendo e scialacquando il suo, gli anni sopravvenero e soperchiò il tempo,spending and squandering his substance, he grew old, and outlived his time; 3. to outrage, to affront, to offend, to injure with arrogance;4. to overcome, to vanquish, to get the better of; s. m. Soperchiá-tóre, f. Soperchiá-tríce; adj. Soperchiá-nte.
Florio: a worlde of wordes, or most copious, dictionarie in Italian and English
soperchiare: to vanquish or ouercome with superfluitie, to outgoe, to exceede. Also to insult vpon, to abuse or offer wrong with odd<*> or aduantage, a<*> to take one pissing against a wall, or being armed and well accompanied to set vpon one that is alone and vnarmed.