astucity
noun
as·tu·ci·ty
-üsətē
plural -es
: the quality of being astute : astuteness
they had been fools (to put it mildly), while the M'gai had been devils of astucity and treachery
John Masefield
John Masefield
Word History
Etymology
from astucious, after such pairs as English ferocious: ferocity