Is Shrewdest a Real Word?

adj. -er, -est. 1. astute or sharp in practical matters: a shrewd politician.

Is it shrewder or more shrewd?

Shrewder meaning

Comparative form of shrewd: more shrewd.

What does shrewdness mean?

1a : marked by clever discerning awareness and hardheaded acumen shrewd common sense. b : given to wily and artful ways or dealing a shrewd operator. 2a : severe, hard a shrewd knock. b : sharp, piercing a shrewd wind. 3 archaic : mischievous.