Synonyms of underhanded

1 Syllable

sly, wily

2 Syllables

backstairs, undue, scheming, roguish, corrupt, wilier, devious, cheating, shifty, sneaky

3 Syllables

deceitful, dishonest, lubricious, two-faced, guileful, uncandid, untruthful, scoundrelly, furtive, dastardly, underhand

4 Syllables

secretive, undeserved, unscrupulous, unreliable, double-dealing, machiavellian, deceptive, mythomaniac, dirty-dealing, false-hearted, disingenuous, clandestine, unconscientious, profiteering

5 Syllables

under-the-table, exploitative