collogue

v. i. [ Cf. L. colloqui and E. dialogue. Cf. Collocution. ] To talk or confer secretly and confidentially; to converse, especially with evil intentions; to plot mischief. [ Archaic or Colloq. ] [ 1913 Webster ]

Pray go in; and, sister, salve the matter,
Collogue with her again, and all shall be well. Greene. [ 1913 Webster ]

He had been colloguing with my wife. Thackeray. [ 1913 Webster ]