de·ni·a·ble 
(dĭ-nīə-bəl)
(dĭ-nīə-bəl)adj.
1. Possible to contradict or declare untrue: deniable accusations.
2. Being such that plausible disavowal or disclaimer is possible: "Covert action was deniable; a Pentagon program would not be" (Bob Woodward).
de·ni′a·bili·ty n.
de·nia·bly adv.