knave

noun

1. (archaic)A boy; especially, a boy servant.
2. (archaic)Any male servant; a menial.

   “Many a duteous and knee-crooking knave that, doting on his own obsequious bondage, wears out his time, much like his master's ass, For naught but provender, and when he's old – cashier'd! Whip me such honest knaves.”

3. (dated)A tricky, deceitful fellow; a dishonest person.

   “I could plainly diſcover from whence one Family derives a long Chin; why a ſecond hath abounded with Knaves for two Generations, and Fools for two more; why a third happened to be crack-brained, and a fourth to be Sharpers.”

   “He was a man whom scarcely any amount of fortune could have benefited permanently, and who was made to be ruined, to cheat small tradesmen, to be the victim of astuter sharpers: to be niggardly and reckless, and as destitute of honesty as the people who cheated him, and a dupe, chiefly because he was too mean to be a successful knave.”

   “I had never defrauded a man of a farthing, nor called him knave behind his back. But now the last rag that covered my nakedness had been torn from me. I was branded a blackleg, card-sharper, and murderer.”

   “God's bones! Whenever I go to beat those knaves / my tapsters, out she [my wife] comes with clubs and staves, / "Go on!" she screams — and it's a caterwaul — / "You kill those dogs! Break back and bones and all!"”

4. A playing card marked with the figure of a servant or a soldier.