Clam up and Cut short

Clam up verb - To stop talking.

Cut short and clam up are semantically related. in silence topic. In some cases you can use "Cut short" instead a verb "Clam up", when it comes to topics like make or be quiet.

Cut short verb - Make shorter as if by cutting off.

Clam up and cut short are semantically related. Sometimes you can use "Clam up" instead a verb phrase "Cut short".