25B6; adjective the proceedings were completely above board : LEGITIMATE, lawful, legal, licit, honest, fair, open, frank, straight, overt, candid, forthright, unconcealed, trustworthy, unequivocal; informal legit, kosher, pukka, by the book, fair and square, square, on the level, on the up and up, upfront.
dishonest, shady.