DISINGENUITY, noun [dis and ingenuity.] Meanness of artifice; unfairness; disingenuousness; want of candor. [This word is little used, or not at all, in the sense here explained. See Ingenuity. We now use in lieu of it disingenuousness.]
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI