Bilabials are consonants for which the flow of air is stopped or restricted by the two lips. Bilabials may be voiced (vocal cords vibrating during the articulation of the consonant) or voiceless (vocal cords not vibrating during the articulation of the consonant). Here is a list of the bilabials in Present-Day English.
1. /p/ (the phoneme spelled p in pat): voiceless bilabial stop.
2. /b/ (the phoneme spelled b in bat): voiced bilabial stop.
3. /m/ (the phoneme spelled m in mail): (voiced) bilabial nasal.
4. /w/ (the phoneme spelled w in wet): (voiced) bilabial semivowel.
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