A cheeky or impertinent person.
Early 16th century (originally as Jack Napes): perhaps from a playful name for a tame ape, the initial n- by elision of an ape (compare with newt), and the final -s as in surnames such as Hobbes: applied to a person whose behaviour resembled that of an ape.
“The grinning jackanapes is unstoppable and half mad with power.”
Secretly allow (something immoral, illegal, or harmful) to occur.
Conspire to do something immoral, illegal, or harmful.
Early 17th century: from French conniver or Latin connivere ‘shut the eyes (to)’, from con- ‘together’ + an unrecorded word related to nictare ‘to wink’.
Blow a current of air through (grain) in order to remove the chaff./ Manually remove chaff from grain.
Remove (people or things) from a group until only the best ones are left./ Find the useful part of something.
Old English windwian, from wind (see wind).