Clam up and Tongue tie

Clam up verb - To stop talking.

Tongue tie and clam up are semantically related In some cases you can replace phrase "Tongue tie" with "Clam up", this terms are similar.

Tongue tie noun - A congenital anomaly in which the mucous membrane under the tongue is too short limiting the mobility of the tongue.

Clam up and tongue tie are semantically related in silence topic. Sometimes you can use "Clam up" instead a verb phrase "Tongue tie", if it concerns topics such as make or be quiet.