Clam up and Hog-tie

Clam up verb - To stop talking.

Hog-tie and clam up are semantically related. In some cases you can use "Hog-tie" instead a verb "Clam up".

Hog-tie verb - To create difficulty for the work or activity of.

Clam up and hog-tie are semantically related. Sometimes you can use "Clam up" instead a verb phrase "Hog-tie".