In phonetics, a bilabial sound refers to a sound that is pronounced using both lips.

He bit his both lips trying to hide his nervousness.

Both of my parents are doctors.

Both of my parents are doctors.

This old gold coin was measured in ryo, a traditional unit of weight.

He expressed his gratitude to both of his parents.

I am waiting for a car of a train.

He used a double capture strategy in shogi.

He is ambidextrous, and can write equally well with both his left and right hand.

Amphibians can live both in water and on land.