Collusive

[kə'lʊsɪv]

(adj.) acting together in secret toward a fraudulent or illegal end .

Checked by Elisha--From WordNet

(a.) Characterized by collusion; done or planned in collusion.

(a.) Acting in collusion.

Typist: Remington

a. Deceitful, fraudulent, deceptive, dishonest, covinous.

Checker: Rupert