viperous

== English == === Etymology === From viper + -ous. === Adjective === viperous (comparative more viperous, superlative most viperous) of or pertaining to a viper Synonym: viperish venomous, malicious or treacherous Synonyms: reptilian, reptitious, viperish; see also Thesaurus:evil, Thesaurus:treacherous ==== Derived terms ==== viperously === Anagrams === pervious, previous