敵 (てき) is a relatively straightforward term – it means enemy. The one thing to keep in mind is that occasionally it can refer to another human player rather than an in-game enemy; in this case, “opponent” is a more appropriate translation than “enemy.”

An interesting compound using 敵 is 無敵 (むてき), which is the Japanese word for “invincibility” and should never be translated as “no enemies.” A frequently used, non-idiomatic four character compound is 一時無敵 (いちじむてき), which means “temporary invincibility.”