tight-lipped

adj.

紧闭嘴巴的，守口如瓶的；讷口少言；嘴紧；口紧

Tight-lipped
Viewpoint: Tight-lipped Tyco gets disclosure indigestion.(Tyco International Ltd.'s acquisitions disclosure)(Brief Article)
Genetic Therapies Inc.: tight-lipped for now
Israel remains tight-lipped over Syrian air strike
Tight-Lipped over Ethics Inquiry
With Apple tight-lipped about info, experts probe the device and develop new programs
PR Pro Calls NCUA's Response to Data Breach 'Tight-Lipped'
Tight-Lipped Tom Could Stand to Loosen Up
NATO and Canada, 1990-1993: The Tight-Lipped Ally
UK: Marks & Spencer tight-lipped on Australian entry