What does "disingenuous" mean?

Disingenuous: Not ingenuous; wanting in noble candor or frankness; not frank or open; uncandid; unworthily or meanly artful. So disingenuous as not to confess them [faults]. Pope. -- Dis`in*gen"u*ous*ly, adv. T. Warton. -- Dis`in*gen"u*ous*ness, n. Macaulay.

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