Is “Shrewdest” a Scrabble word?
Yes
SHREWDEST
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Shrewdest
adjective
1.Showing clever resourcefulness in practical matters.
2.Artful, tricky or cunning.
3.Streetwise.