The new manager is rather secretive about the details of the upcoming merger.

新經理對即將到來的合併細節口風相當緊。

Customers grew suspicious when the airline remained secretive about the cause of the delays.

航空公司對延誤原因始終守口如瓶，讓旅客開始起疑。

Our supplier has been secretive about its shipping costs, so we requested a full breakdown.

我們的供應商一直對運費諱莫如深，所以我們要求提供完整明細。