(a.) Of or pertaining to manipulation; performed by manipulation.

Byzantine Machiavellian artful canny careful chary chiseling circumspect collusive computational computative computing connivent conniving considerate conspiring contriving covinous crafty cunning deceitful designing devious discreet disingenuous enumerative estimating estimative FALSE falsehearted finagling forsworn foxy fraudulent furtive gingerly guarded guileful indirect insidious insincere intriguing knowing manipulative numerative pawky perjured plotting quantifying safe scheming sharp shifty shrewd slick slippery sly sneaky statistical stratagemical subtile subtle surreptitious treacherous trickish tricky two-faced uncandid underhand underhanded unfrank unsincere untruthful up to wary wily