1. (n.) Intentional failure or forbearance to discover a fault or wrongdoing; voluntary oversight; passive consent or cooperation.

2. (n.) Corrupt or guilty assent to wrongdoing, not involving actual participation in, but knowledge of, and failure to prevent or oppose it.

OK acceptance accord acquiescence affirmation affirmative affirmative voice agreement approbation approval artifice assent aye blessing cabal chicane chicanery collusion compliance complicity complot confederacy connivery consent conspiracy contrivance contriving counterplot covin deep-laid plot dodgery eagerness endorsement engineering finagling finesse foul play frame-up game indulgence intrigue little game machination maneuvering manipulation okay overlooking permission permissiveness pettifoggery pettifogging plot plotting promptitude promptness ratification readiness rigging sanction scheme schemery scheming sharp practice skulduggery sleight stratagem submission sufferance supercherie tolerance toleration trick trickery underhand dealing underplot ungrudgingness unloathness unreluctance web of intrigue willingness winking wire-pulling