weakening
词形变化：
名词: weakener | 动词过去式: weakened | 动词过去分词: weakened | 动词现在分词: weakening | 动词第三人称单数: weakens |
同义词：
enervating | deterioration | decline | damage | destabilization | undermining | decay | debilitating | draining | devastating | flagging | fading | tiring | waning | wearying | debilitative | enfeebling |
反义词：