adj. 25B6; adjective
an honest man : UPRIGHT, honourable, moral, ethical, principled, righteous, right-minded, respectable; virtuous, good, decent, law-abiding, high-minded, upstanding, incorruptible, truthful, trustworthy, trusty, reliable, conscientious, scrupulous, reputable; informal on the level.
I haven't been honest with you : TRUTHFUL, sincere, candid, frank, open, forthright, straight; straightforward, plain-speaking, matter-of-fact; informal upfront.
an honest mistake : GENUINE, real, authentic, actual, true, bona fide, legitimate, fair and square; informal legit, kosher, on the level, honest-to-goodness.
unscrupulous, insincere.