KEEN
Foxy Cunning
With a special axe to grind
He caught you napping
A piece of sharp practice
A shrewd surmise
A bit of keen reasoning
Too ingenious by half
Neutrals think to tread on eggs and break none
As cunning as a weasel
A mind like a steel-trap
Bait the hook well; the fish will bite.
Much Ado about Nothing, II., 3
Reared in the school of diplomacy
A discipleship with mental reservations
He turns a blow with a jest