HYPERVENTILATE Antonyms There are 2 antonyms of the word hyperventilate. (opposite meanings)Did you mean?Definition of HYPERVENTILATEAlso try opposite words for..hyperventilatedhyperventilateshyperventilationBest Opposite Words For HYPERVENTILATETop 20Top 10 Top 20 (Default)Top 50 Top 100 All All (Default)WordsPhrases All All (Default)Verb Noun Adjective Adverb RankWordSave?Synonyms..UsageType1relaxverbv2calm down Alternatives for RELAX Words (9)loosenunbendunwinddecompresslooseslackslackenunlaxunstrainPhrases (4)loosen upmake relaxedslack upslow downOpposite words for relax