The Collaborative International Dictionary of English v.0.48:

Cun \Cun\ (k[u^]n), v. t. [See Cond.]
   To con (a ship). [Obs.]
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Cun \Cun\, v. t. [See 1st Con.]
   To know. See Con. [Obs.]
   [1913 Webster]