weakens
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：
decline | fail | dilute | enervate | deteriorate | give in | cave in | undermine | give way | damage | destabilize | detract from | shake | water down | thin | adulterate | enfeeble | exhaust | soften | droop | languish | impair | disable | fade | cripple | depress | water | faint | lessen | sink | silence | loosen | sap | pine | flag | lower | step down | de-escalate | sabotage | damp | counteract | subvert | dampen | countermine | break |
反义词：