Meanings

rival in (the game of) go

a friend today may turn against you tomorrow

know your enemy, know thyself, and you shall not fear a hundred battles

rival company

to hate the very sight of

enemy general

friend and foe

to save an enemy from trouble instead of taking advantage of their weakness

regarding as an enemy

very lovely

to turn against

approaching the enemy

enemy castle

hostile act

language of the enemy (esp. English in Japan during WWII)

adversary

landing in the face of the enemy

enemy ship

enemy of Buddhism

opponent's car (in racing games)