Meaning

verb get into a prostrate position, as in submission

verb render helpless or defenseless

verb throw down flat, as on the ground

originFrom Middle English prostraten (“(reflexive) to prostrate; (with doun) to fall down in a state of humility or submission”), from prostrat(e) (“prostrate, prostrated”, also used as the past participle of prostraten) + -en (verb-forming suffix), from Latin prōstrātus, see -ate (verb-forming suffix) and Etymology 1 for more.

Etymology from Wiktionary, CC BY-SA 3.0