To occupy or establish in a position beforehand or in advance.
From 'be-' plus 'forested' or 'forestal,' possibly related to 'stead' (a place), creating a rare compound meaning to establish or position something in advance. This is an extremely rare and archaic formation.
This word is so obscure that even the Oxford English Dictionary has minimal citations—it appears to be a theoretical construction showing how English's productive word-formation rules could create new verbs, whether people actually used them or not.
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