disingenuous

adjective3

1. •
   Not ingenuous; not frank or open.

   • I am not so vain as to think these Remarks free from faults, nor so disingenuous as not to confess them: — 1726
2. •
   Assuming a pose of naïveté to make a point or for deception.
3. •
   Not honourable; unworthy of honour.