hush up

(verb) cover up a misdemeanor, fault, or error. Synonyms: whitewash, gloss over, sleek over, hush up. Examples: "Let's not whitewash the crimes of stalin." "She tried to gloss over her mistakes."

(verb) cause to be quiet or not talk. Synonyms: hush, quieten, silence, still, shut up, hush up. Example: "Please silence the children in the church!."