Disingenuous

ˌdɪsɪnˈdʒɛnjʊəs

adjective

not candid or sincere, typically by pretending that one knows less about something than one really does

The word 'disingenuous' comes from the Latin word 'disingenuus,' meaning of base or low birth. It evolved over time to its current usage to describe someone who is not straightforward or honest in their communication.

Woman is perfidious and disingenuous.

Victor Hugo

Les Misérables

This disingenuous answer promoted me, in six months, to be chief confidence-man.

T. E. Lawrence

Seven Pillars of Wisdom