An archaic form meaning the act of forbidding; a prohibition or ban.
From 'forbid' + '-al' (noun suffix indicating an action or result). The '-al' suffix creates nouns from verbs, as in 'removal' from 'remove.'
The '-al' suffix creates nouns that describe the action itself rather than the person doing it—'forbidal' is the action of forbidding, just as 'approval' is the action of approving.
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