shut up is a verb and adjective meaning "refuse to talk or stop talking; fall silent". It carries 4 recorded senses.
place in a place where something cannot be removed or someone cannot escape
“The parents locked her daughter up for the weekend”
“She locked her jewels in the safe”
Definitions, synonyms and semantic relations for shut up come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.