BRISTLE UP Antonyms There are 3 antonyms of the phrase bristle up. (opposite meanings)Did you mean?Definition of BRISTLE UPBest Opposite Words For BRISTLE UPTop 20Top 10 Top 20 (Default)Top 50 Top 100 All All (Default)WordsPhrases All All (Default)Verb Noun Adjective Adverb RankWordSave?Synonyms..UsageType1relaxverbv2unwindverbv3calm down Alternatives for RELAX Words (9)loosenunbendunwinddecompresslooseslackslackenunlaxunstrainPhrases (4)loosen upmake relaxedslack upslow downOpposite words for relax Alternatives for UNWIND Words (9)relaxuntwineuntwistdecompressdisentangleunbendunlaxunrollunstrainPhrases (4)loosen upmake relaxedslow downwind offOpposite words for unwind