Labialization

In phonetics, labialisation is a rounded type of secondary articulation.

Types of labialisation

There are 2 types of labialisation.

Labialisation (protuded)

Labialisation (with protuded lips)
◌ʷ
Encoding
X-SAMPA_w or +w

Protuded labialisation, also known as endolabialisation is made with rounding your lips with protusion.

Labialisation (compressed)

Labialisation (with compressed lips)
◌ᵝ
Encoding
X-SAMPA+B

Compressed labialisation, also known as exolabialisation is made with rounding your lips with compression.