to cover with fog; to obscure or confuse as if with fog.
From 'be-' plus 'fog,' which comes from Scandinavian sources. The verb creates an image of something becoming hidden or obscured by fog or confusion.
'Befog' is one of the few 'be-' verbs to survive in modern usage—we still say 'the issue was befogged,' showing that this old verb formation hasn't entirely disappeared from English.
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