knave Definition

knave
noun

old use:
1. cards.
The jack.
2. A mischievous young man; a scoundrel.

Thesaurus: scamp, fraud, villain, rascal, stinker (slang), cheat, rapscallion, rogue, reprobate, bastard (slang), scoundrel, blackguard, swindler, swine.

Derivative: knavery
noun

Mischief; trickery.

Derivative: knavish
adj

Of or characteristic of a scoundrel
Thesaurus: felonious, fraudulent, corrupt, damnable, devilish, deceptive, fiendish, wicked, villainous, roguish, reprobate, contemptible, rascally; Antonym: honest, scrupulous.

Etymology: Anglo-Saxon cnafa a boy or youth.