Pashke's flat lips almost disappeared, though he made no comment.

The corners of the mouth turn down, and the upper lip may disappear altogether.

Her lips would disappear in a tight mean line.

The lips disappeared and small, yellow teeth took their place.

Sinbad's lips had disappeared because he was pressing them shut so hard; we couldn't get his mouth open.

When he looked back at Antonina, his lips had disappeared entirely.

Her lips disappear between her teeth, and for the first time she looks uncomfortable.

She eyed him narrowly, and her lips all but disappeared.

Her lips all but disappeared into a thin line whenever she spoke to Silenus.

Guy's full lips disappeared into a tight pink line.