word-forming element meaning "above, over, beyond," from Latin super (adverb and preposition) "above, over, on the top (of), beyond, besides, in addition to," from *(s)uper-, variant form of PIE root *uper "over." In English words from Old French, it appears as sur-. The primary sense seems to have shifted over time from usually meaning "beyond" to usually meaning "very much," which can be contradictory. E.g. supersexual, which is attested from 1895 as "transcending sexuality," from 1968 as "very sexual."
early 13c., chargen, "to load, put a burden on or in; fill with something to be retained," from Old French chargier "to load, burden, weigh down," from Late Latin carricare "to load a wagon or cart," from Latin carrus "two-wheeled wagon" (see car).
The senses of "entrust," "command," and "accuse" all emerged in Middle English and were found in Old French. The sense of "rush in to attack, bear down upon" is from 1560s, perhaps through the earlier meaning "load a weapon" (1540s). The meaning "impose a burden of expense" is from mid-14c. That of "to fix or ask as a price" is from 1787; the meaning "hold liable for payment, enter a debt against" is by 1889. The meaning "fill with electricity" is from 1748. Related: Charged; charging.