knave

An unprincipled, crafty fellow.

A male servant.

A man of humble birth.

To prove or make a knave.

A boy; a boy as a servant; a servant; a fellow.

A friend; a crony: used as a term of endearment.

A false, deceitful fellow; a dishonest person; one given to fraudulent tricks or practices; a rogue or scoundrel.

A playing-card with a servant (usually, in English and American cards, in a conventionalized costume of the sixteenth century) figured on it; a jack.