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

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v. Present participle of jail.

n. An instance of a person being jailed.

n. The act or process of putting someone in prison or in jail as a lawful punishment.

"Since August of 2006, illegal residence in Mexico has been a fineable offence (up to 500 salarios minimo) and jailing is very rare."

imprisonment   

jail   

ailing    assailing    bailing    baling    curtailing    derailing    detailing    emailing    entailing    failing