Jack
Part of speech: verb
Definition: To use a jack. To hit the ball hard. To hit a home run. To steal.
Part of speech: interjection
Definition: A player has hit a home run
Part of speech: noun
Definition: A mechanical device used to raise and (temporarily) support a heavy object. A man or men in general. A male animal. The card ranking between the ten and queen of any suit, picturing a knave or prince on its face, and in some card games having a value of eleven. A male ass. A surface-mounted connector for electrical, especially telecommunications, equipment. A target ball in bowls, etc; a jack-ball. A small, six-pointed playing piece used in the game of jacks. Nothing, jackshit. A small flag at the bow of a ship. A naval ensign flag flown from the main mast, mizzen mast, or the aft-most major mast of (especially) British sailing warships; Union Jack. A coarse and cheap medieval coat of defense, especially one made of leather. A penny with a head on both sides, used for cheating. (Reference: Sidney J. Baker, The Australian Language, second edition, 1966, chapter XI section 3, page 243.) Money. A smooth often ovoid large gravel or small cobble in a natural water course. A common name for the freshwater pike, green pike or pickerel. Large California rockfish. An order of marine fish in the Carangidae family. A sailor; a "jack tar".
Example sentence: I'm a jack of all trades, master of none.
Knave
Part of speech: noun
Definition: A tricky, deceitful fellow; a dishonest person; a rogue; a villain.A playing card marked with the figure of a servant or soldier; a jack.A boy; especially, a boy servant.Any male servant; a menial.
Example sentence: It is a just political maxim, that every man must be supposed a knave.