Wiktionary
complicitous
a. complicit.
Usage examples of "complicitous".
With calm relish he read out extracts from the newspaper that the boy broughtaccounts of greed, spite and follyand commented on them in that complicitous way he had of making the good seem bad and the bad seem good.
The brief look which passed between them reminded me of the complicitous glance I had once seen fly like a live spark between two of their New Covenant forebears, one gripping the hind legs of a pig, the other its front legs and a knife, in the moment before the knife opened the pig's throat and an arc of blood threw itself high into the air.