1. (a.) Sneaky; deceptive; clandestine; as underhanded negotiating tricks\.

2. (a.) Insufficiently provided with hands or workers; short-handed; sparsely populated.

amoral artful back-door backstairs calculating chiseling clandestine collusive conscienceless corrupt corrupted covert covinous crafty criminal crooked cunning dark deceitful devious dishonest dishonorable doubtful dubious duplicitous evasive FALSE falsehearted feline felonious finagling fishy fraudulent furtive guileful hidlings hole-and-corner hugger-mugger ill-got ill-gotten immoral indirect insidious not kosher privy questionable quiet rotten scheming shady shameless sharp shifty sinister skulking slinking slinky slippery sly sneaking sneaky stealthy surreptitious suspicious treacherous trickish tricky two-faced unconscienced unconscientious unconscionable under-the-counter under-the-table undercover underground underhand undermanned understaffed unethical unobtrusive unprincipled unsavory unscrupulous unstraightforward wily without remorse without shame