单词	slackness
释义	slackslack1 /slæk/ adjective Etymology ETYMOLOGYslack1 Origin: Old English sleac 1 with less business activity than usual:  Business was slack.2hanging loosely, or not pulled tight:  a slack rope3disapproving not taking enough care or making enough effort to do things right SYN lax:  slack security—slackly adverb—slackness noun [uncountable]
随便看	retract retractable retraction retrain retraining retread retreat retrench retrenchment retrial retribution retributive retrievable retrieval retrieve retriever retro retro- retroactive retroactively retrofit retrofitting retroflex retrograde retrogress

英语词典包含48224条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。