The Vocalibrate dictionary

disingenuous

/ˌdɪsɪnˈdʒɛnjuəs/adjective

insincere, often by pretending to be innocent or open

It was disingenuous of the company to claim it had no idea about the defect.

Near in meaning
insincereduplicitousdeceitfultwo-faced
In the family
disingenuouslydisingenuousnessingenuousingenuousness

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