Synonyms of dirty-dealing

1 Syllable

sly, wily

2 Syllables

sneaking, crooked, secret, unfair, stealthy, tricky, cunning, unjust, devious, hush-hush, shifty, shady, crafty, sneaky

3 Syllables

concealed, sub-rosa, treacherous, dishonest, two-faced, two-timing, guileful, lubricious, indirect, insidious, slippery, oblique, fraudulent, furtive, underhand

4 Syllables

secretive, underhanded, unscrupulous, unprincipled, duplicitous, deceptive, undercover, unethical, clandestine, double-crossing, surreptitious

5 Syllables

dishonorable