To hush up

to procure silence concerning; to suppress; to keep secret.
- Pope.

See also: Hush

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
A source disclosed that the district high ups had made several efforts to hush up the issue apparently on pressure of a powerful federal minister, who is said to be the uncle of main accused Zubair Khan.
The court agreed with the contention of the Lt Col that the court of inquiry was not done deliberately to hush up the matter against the higher ups in the force.
The opening scenes, set in 1953 when Churchill was 78 and in his second term as PM, see him confined to bed with a stroke while his aides try to hush up his failing health.