1A person or group one fights, competes against, or opposes; a rival or adversary.
このゲームでは敵を倒してポイントを稼ぐ。
In this game, you earn points by defeating enemies.
彼は政界における最大の敵だと言われている。
He is said to be the biggest rival in the political world.
試合前に敵チームの弱点を分析した。
Before the match, we analyzed the opposing team's weaknesses.
昔の敵と和解して友人になった。
He reconciled with an old enemy and became friends.
2Something that poses harm or danger to oneself or a situation; can refer to a non-human threat.
睡眠不足は健康の敵だ。
Lack of sleep is the enemy of health.
油断は登山者にとって最大の敵になる。
Carelessness becomes the greatest danger for mountain climbers.
湿気は木製家具の敵である。
Humidity is the enemy of wooden furniture.