[xuē ruò]

cripple the enemy; weaken the enemy
削弱敵人的力量

weaken the position of sb.
削弱某人的地位

The troops for the landing were taken from Alexander's force and that put a brake on his operations.
登陸部隊是從亞歷山大將軍的兵力中抽調出來的， 這就削弱了他的軍事力量。