Is “Disallow” a Scrabble word?
Yes
DISALLOW
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 Disallow
/dɪsəˈlaʊ/
verb
1.To refuse to allow
“The prisoners were disallowed to contact with a lawyer.”
2.To reject as invalid, untrue, or improper
“The goal was disallowed because the player was offside.”