| sulcate | (adjective) having deep narrow furrows or grooves | - |
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| sulfuretted | (adjective) treated or impregnated with sulfur | Synonyms: sulfurized, sulphuretted |
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| sulfuric | (adjective) of or relating to or containing sulfur | Synonyms: sulphuric |
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| sulfurized | (adjective) treated or impregnated with sulfur | Synonyms: sulfuretted, sulphuretted |
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| sulfurous | (adjective) of or related to or containing sulfur or derived from sulfur | Synonyms: sulphurous |
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| (adjective) characterized by oppressive heat and humidity | Synonyms: stifling, sulphurous, sultry |
| (adjective) harsh or corrosive in tone | Synonyms: acerb, acerbic, acid, acrid, bitter, blistering, caustic, sulphurous, virulent, vitriolic |
| sulky | (adjective) depressingly dark | Synonyms: gloomful, glooming, gloomy |
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| (adjective) sullen or moody | Synonyms: huffish |
| (adjective) slow or slothful | Synonyms: sluggish |
| sullen | (adjective) darkened by clouds | Synonyms: heavy, lowering, threatening |
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| (adjective) showing a brooding ill humor | Synonyms: dark, dour, glowering, glum, moody, morose, saturnine, sour |
| sulphuretted | (adjective) treated or impregnated with sulfur | Synonyms: sulfuretted, sulfurized |
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| sulphuric | (adjective) of or relating to or containing sulfur | Synonyms: sulfuric |
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| sulphurous | (adjective) of or related to or containing sulfur or derived from sulfur | Synonyms: sulfurous |
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| (adjective) characterized by oppressive heat and humidity | Synonyms: stifling, sulfurous, sultry |
| (adjective) harsh or corrosive in tone | Synonyms: acerb, acerbic, acid, acrid, bitter, blistering, caustic, sulfurous, virulent, vitriolic |
| sultry | (adjective) characterized by oppressive heat and humidity | Synonyms: stifling, sulfurous, sulphurous |
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| (adjective) sexually exciting or gratifying | Synonyms: sensual |