from
The Collaborative International Dictionary of English v.0.48
Disingenuous \Dis`in*gen"u*ous\, a.
1. Not noble; unbecoming true honor or dignity; mean;
unworthy; as, disingenuous conduct or schemes.
[1913 Webster]
2. Not ingenuous; wanting in noble candor or frankness; not
frank or open; uncandid; unworthily or meanly artful.
[1913 Webster]
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.
[1913 Webster]