The opposite of being unique is…”being the same along with everybody else” (yea lack of term).
It’s impossible to be unique. Because sure, even if you you unique but if other people are too (which society says we are all unique), then that means “we’re the same as everybody else”. So we’re not unique LOL.
Not to be pessimistic. In fact I encourage everyone to be unique. Just brushing up my Mathematical proofs here lol.