double-faced

double-faced (not comparable)

1. Having two functional faces.

   Synonym: two-faced

   a double-faced hammer

2. Deceitful; hypocritical; treacherous.

   Synonyms: double-hearted, Janus-faced, two-faced; see also Thesaurus:deceptive, Thesaurus:treacherous

   • 1671, John Milton, “Samson Agonistes, […]”, in Paradise Regain’d. A Poem. In IV Books. To which is Added, Samson Agonistes, London: […] J[ohn] M[acock] for John Starkey […], →OCLC:

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

   • 1953 December 7, “ASIA: The Two Anti-Communists”, in TIME‎^[1]:

     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.”

• speak with a forked tongue

• “double-faced”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.