double-faced

Having two functional faces.

a double-faced hammer

Deceitful; hypocritical; treacherous.

Fame , if not double-faced , is double-mouthed , And with contrary blast proclaims most deed

A deep-seated misgiving about U.S. Asian policy is spreading among anti-Communists in Southeast Asia, who fear that the Korean truce is the first sign of U.S. withdrawal. In Hong Kong, anti-Communist Chinese newspapers, even those critical of Chiang, now talk about “U.S. double-faced diplomacy.” One said that “Ike and Dulles have stepped right into Acheson’s shoes.”