not straightforward or candid; giving a false appearance of frankness; "an ambitious, disingenuous, philistine, and hypocritical operator, who...exemplified...the most disagreeable traits of his time"- David Cannadine; "a disingenuous excuse"
conceal one's true motives from especially by elaborately feigning good intentions so as to gain an end; "He bamboozled his professors into thinking that he knew the subject well"