Akademik

belt up

verb

refuse to talk or stop talking; fall silent

-

The children shut up when their father approached

• Syn:

↑close up, ↑clam up, ↑dummy up, ↑shut up, ↑button up, ↑be quiet, ↑keep mum

• Ant: ↑open up (for: ↑close up)

• Verb Frames:

-

Somebody ——s

Useful english dictionary. 2012.