Is “Yawniest” a Scrabble word?
Yes
YAWNIEST
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 Yawniest
adjective
1.Prone to yawning.
2.Sounding like a yawn.
3.Boring, uninteresting, causing yawns.