攻囲 is read as こうい (koui) and means siege.
こうい
koui
こうげき
criticism
せめる
to attack
こうせい
offensive (movement)
こうぼう
offense and defense
せめ
top (dominant partner of a homosexual relationship)
こうしゅ
こうりゃく
attacking (a problem) strategically
せめたてる
to make an incessant onslaught
せめこむ
to invade
せめのぼる
to march on the capital
せめて
offense
こうがく
dedication to study or research