to border or edge something with a fringe; to decorate the edge or boundary of something with hanging threads or strips.
From be- + fringe, following the pattern of other be- verbs. Fringe comes from Latin 'fimbria' meaning edge or border; the be- prefix makes it mean 'to cover with fringe.'
This word barely survives in modern English, but it's a perfect example of how the be- prefix let speakers turn almost any noun into a verb—you could befringe a tablecloth just like you could 'be-anything' in Middle English.
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