slack up 1verbdomain: changePrinceton WordNet [ver.3.1]EnglishDefinitionmake less active or fastReport errorPath to highest hypernymMorphologySynset graphExamples1.He slackened his pace as he got tired2.Don't relax your efforts nowSynonymsslack 4make less active or fastslacken 2make less active or fastrelax 8make less active or fast