Acting together in secret toward a fraudulent or illegal end.

synonym: conniving.

Roget 544: false, deceitful, mendacious, unveracious, fraudulent, dishonest, faithless, truthless, trothless; unfair, uncandid; hollow-hearted; evasive; uningenuous, disingenuous; hollow, sincere, Parthis mendacior; forsworn.    artificial, contrived; canting; hypocritical, jesuitical, pharisaical; tartuffish; Machiavelian; double, double tongued, double faced, double handed, double minded, double hearted, double dealing; Janus faced; smooth-faced, smooth spoken, smooth tongued; plausible; mealy-mouthed; affected etc. 855.    collusive, collusory; artful etc. (cunning) 702; perfidious etc. 940; spurious etc. (deceptive) 545; untrue etc. 546; falsified etc. v.; covinous.    ... show more