shrewdly

adjective

1. Obsolete
   1. evil, bad, wicked, mischievous, shrewish, etc.
   2. artful, cunning, wily, etc. in one's dealings with others
2. keen-witted, clever, or sharp in practical affairs; astute: the usual current sense
3. Archaic keen; piercing; sharp

Origin: ME schrewed, pp. of schrewen, to curse < schrewe: see shrew