collogue
Concise Oxford English Dictionary © 2008 Oxford University Press:
collogue /kɒˈləʊg/
▶verb (collogues, colloguing, collogued) archaic talk confidentially.
– origin C17: prob. an alt. of obs. colleague ‘conspire’, by assoc. with L. colloqui ‘to converse’.
'collogue' also found in these Oxford entries:

