is the word 'opponent' derived from the word 'oppose'?
The two words are related, and both come from the Latin opponere, which is made from ob ("towards") and ponere ("to place").
"Opponent" is derived from the present participle opponens.
"Oppose" comes from opponere, but came to English via Old French, where it was changed to opposer due to influence from the verb poser, which is similar in meaning to Latin ponere.
So no, "opponent" is not derived from "oppose"; they are both derived from opponere.