denasalize

[ dee-ney-zuh-lahyz ]
/ diˈneɪ zəˌlaɪz /

verb (used with object), de·na·sal·ized, de·na·sal·iz·ing. Phonetics.

to diminish the nasal resonance of (speech or a speech sound).
Also especially British, de·na·sal·ise.

Origin of denasalize