vt.& vi.（使）放慢；（使）放松、松懈、松弛；（使）减弱； 变形： 过去式：slackened过去分词：slackened现在分词：slackening第三人称单数：slackens 英英释义： slacken[ 'slækən ]v.become slow or slower同义词：slowslow downslow upslackmake less active or fast"He slackened his pace as he got tired"同义词：slackslack uprela