double-tongued \dou"ble-tongued`\, a.
   making contrary declarations on the same subject; deceitful.

   syn: deceitful, double-faced, hypocritical, janus-faced,
        two-faced.
        1913 webster

              likewise must the deacons be grave, not
              double-tongued.                     --1 tim. iii.
                                                  8.
        1913 webster

double-tongued
     adj : marked by deliberate deceptiveness especially by pretending
           one set of feelings and acting under the influence of
           another; "she was a deceitful scheming little thing"-
           israel zangwill; "a double-dealing double agent"; "a
           double-faced infernal traitor and schemer"-
           w.m.thackeray syn: ambidextrous, deceitful, double-dealing,
            duplicitous, janus-faced, two-faced, double-faced
see also:
ambidextrous deceitful double-dealing duplicitous janus-faced two-faced 
double-faced