| sulfate | (verb) convert into a sulfate | - |
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| sulfur | (verb) treat with sulphur in order to preserve | Synonyms: sulphur |
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| sulfurette | (verb) combine with sulfur | Synonyms: sulphurette |
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| sulk | (verb) be in a huff and display one's displeasure | Synonyms: brood, pout |
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| sully | (verb) charge falsely or with malicious intent; attack the good name and reputation of someone | Synonyms: asperse, besmirch, calumniate, defame, denigrate, slander, smear, smirch |
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| (verb) make dirty or spotty, as by exposure to air; also used metaphorically | Synonyms: defile, maculate, stain, tarnish |
| (verb) place under suspicion or cast doubt upon | Synonyms: cloud, corrupt, defile, taint |
| sulphur | (verb) treat with sulphur in order to preserve | Synonyms: sulfur |
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| sulphurette | (verb) combine with sulfur | Synonyms: sulfurette |
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