dulling
dul-ling
verb
Making something less sharp, bright, intense, or interesting.
"The dust was dulling the shine."
noun
The act or process of making something less sharp, bright, or exciting.
"The dulling of his senses was gradual."
Thesaurus
Synonyms: thudding, nonresonant, dull, unreverberant, leaden, cloudy, muffled, softened, muted, soft, blunt, pall