WordNet sense 1 (of or related to or containing sulfur or derived from sulfur):

sulphurous

WordNet sense 2 (harsh or corrosive in tone):

acerbic, acid, acrid, bitter, blistering, caustic, venomous, virulent, vitriolic, acerb

WordNet sense 3 (disagreeable to the senses, to the mind, or feelings ):

unpleasant

WordNet sense 4 (characterized by oppressive heat and humidity):

stifling, sultry

WordNet sense 5 (used of physical heat; having a high or higher than desirable temperature or giving off heat or feeling or causing a sensation of heat or burning):

hot