delabialize

[ dee-ley-bee-uh-lahyz ]
/ diˈleɪ bi əˌlaɪz /
Phonetics

verb (used with object), de·la·bi·al·ized, de·la·bi·al·iz·ing.

to deprive (a sound) of labial character, as in unrounding a vowel.

verb (used without object), de·la·bi·al·ized, de·la·bi·al·iz·ing.

(of a speech sound) to lose its labial character.

Origin of delabialize

First recorded in 1870–75; de- + labialize