con sordino
adverb/ˌkɒn sɔːˈdiːnəʊ/
/ˌkɑːn sɔːrˈdiːnəʊ/
(music, from Italian)- (used as an instruction) played using a muteWord OriginItalian.
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con sordino
Definition of con sordino adverb from the Oxford Advanced Learner's Dictionary