Definition of labialize in English:

labialize

(British labialise)

verb

[with object]Phonetics
  • Pronounce (a consonant) with partial or complete closure of the lips, or (a vowel) with rounded lips.

    ‘a non-standard dialect that labializes the /r/ and /l/ sounds’
    ‘a voiceless labialized uvular fricative’

Pronunciation

labialize

/ˈleɪbɪəlʌɪz/