"mattes" in the noun sense
a mixture of sulfides that forms when sulfide metal ores are smelted
2. flatness, lusterlessness, lustrelessness, mat, matt, matte
the property of having little or no contrast lacking highlights or gloss
"mattes" in the verb sense
1. felt, felt up, mat up, matt-up, matte up, matte, mat
change texture so as to become matted and felt-like
"The fabric felted up after several washes"
Source: WordNet® (An amazing lexical database of English)
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