This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
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v. To refuse to allow: "[The government] disallowed his aging and dying parents any reunion with their only child” ( John Simon).

v. To reject as invalid, untrue, or improper.

v. To refuse to allow

v. To reject as invalid, untrue, or improper

v. To refuse to allow; to deny the force or validity of; to disown and reject.

To refuse or withhold permission to or for; refuse to allow, sanction, grant, or authorize; disapprove: as, to disallow items in an account.

To decline or refuse to receive; reject; disown.

Synonyms To prohibit, forbid, condemn, set aside, repudiate.

To refuse allowance or toleration; withhold sanction.

v. command against

"Of course I might not get the point I can almost assure you that whether to exempt admins from the username disallow was never considered, so it is neither oversight nor bug."

disallowableness    disallowed    disallowing    disallows   

command    require   

disallowance   

criminalise    illegalize    ban    illegalise    exclude    debar    bar    outlaw    criminalize    enjoin   

reject    disapprove    censure    prohibit    deny    refuse   

Bilbao    Bow    Chao    Chow    Dow    Frau    Howe    Lao    Liao    Macao