Vinegar masked the smell of cigarette smoke.
paper over something
The university tried to paper over the financial scandals, but eventually the local press caught on.
Antonyms and examples
show
He showed her the baby bird he was carrying in his hands.
find
I can't find my keys anywhere - have you seen them?
Go to the thesaurus article about these synonyms and antonyms of be shrouded in secrecy/mystery.
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If you hide someone or something, you keep them from being seen.