aboveboard Antonyms

unscrupulously swindling subtle shifty sharp shady shadily roguish rascally perfidious treacherous tricky truthless amoral malfeasant illicitly dodgy back room untruthful unprincipled underhandedly underhand mendacious lying knavish designing deceptive deceitful cunning crooked crafty corruptly corrupt cheating devious dirty dishonest janus-faced illegitimately illegally illegal fraudulent false-hearted false double-faced dishonestly bent