The Oxford Thesaurus An A-Z Dictionary of Synonyms - dampenv.

1) damp, moisten, sprinkle, bedew: Dampen the clothes before ironing them. 2) stifle, deaden, damp, check, chill, cool, restrain, retard, lessen, diminish, reduce, suppress, abate, moderate, allay, subdue, temper, dull, discourage: His constant chattering on about himself dampened her ardour.