sulphurous(adjective) adjective1. of or related to or containing sulfur or derived from sulfurSimilar word(s): sulfurous2. harsh or corrosive in toneSimilar word(s): unpleasant, acerb, acerbic, acid, acrid, bitter, blistering, caustic, sulfurous, virulent, vitriolic3. characterized by oppressive heat and humiditySimilar word(s): hot, stifling, sulfurous, sultry