to  keep   something  under wraps
keep
ki:p
kip
something
ʌndə
andē
under
ræps
rāps
wraps

英語での「 keep something under wraps」の定義と意味

to keep something under wraps
01

to keep something secret or confidential and not to reveal it to others 

慣用句
くだけた
But officials deny they've been keeping their proposals under wraps. 
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