underhand Synonyms

underhanded underhandedly underarm sneaky surreptitious stealthy sneaking sly slippery shrewd shifty shady secretive treacherous tricky undercover unethical dishonourable two-faced duplicitous back room untrustworthy wily unscrupulous unprincipled unfair secret scheming perfidious deceptive deceitful cunning crooked crafty covert corrupt conscienceless conniving clandestine backstairs designing devious dishonest mealy-mouthed janus-faced insidious indirect guileful furtively furtive