sulfurous in WordNet English dictionary

1. harsh or corrosive in tone
   "an acerbic tone piercing otherwise flowery prose"; "a barrage of acid comments"; "her acrid remarks make her many enemies"; "bitter words"; "blistering criticism"; "caustic jokes about political assassination, talk-show hosts and medical ethics"; "a sulfurous denunciation"; "a vitriolic critique"
   acerb  acerbic  acid  acrid  bitter  blistering  caustic  sulfurous  sulphurous  virulent  vitriolic 
   
2. characterized by oppressive heat and humidity
   "the summer was sultry and oppressive"; "the stifling atmosphere"; "the sulfurous atmosphere preceding a thunderstorm"
   sultry  stifling  sulfurous  sulphurous 
   
3. of or related to or containing sulfur or derived from sulfur
   sulfurous  sulphurous 
   

sulfurous in English Wiktionary