Knavish a. : Like or characteristic of a knave; given to knavery; trickish; fraudulent; dishonest; villainous; as, a knavish fellow, or a knavish trick.

Knavish a. : Mischievous; roguish; waggish.

Example:
Does God frustrate the Knavish tricks of those who would critisize the royal family?

Taxonomy
dictionary, knave, Encyclopedia, ish, thesaurus browser, online dictionary, male servant, Translations, Free Online Dictionary, synonyms, antonyms, skill, knavish tricks, Bergen, Pross, English dictionary, the Black knight, knavery.

Defination from the web:
knavish in the Online Dictionary. Meaning of knavish. Pronunciation of knavish. Translations of knavish. knavish synonyms, knavish antonyms. ... knavish - marked by skill in deception; "cunning men often pass for wise"; "deep political machinations"; "a foxy ... knavish ...