vitriolous

== English == === Etymology === From vitriol +‎ -ous. === Adjective === vitriolous (comparative more vitriolous, superlative most vitriolous) (obsolete) Synonym of vitriolic. === References === “vitriolous”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.