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denasalize

American  
[dee-ney-zuh-lahyz] / diˈneɪ zəˌlaɪz /
especially British, denasalise

verb (used with object)

Phonetics.
denasalized, denasalizing
  1. to diminish the nasal resonance of (speech or a speech sound).


Etymology

Origin of denasalize

de- + nasalize