GNU Collaborative International Dictionary of English

Found one definition

      
Be-. [AS. be, and in accented form bī, akin to OS. be and bī, OHG. bi, pi, and pī, MHG. be and bī, G. be and bei, Goth. bi, and perh. Gr. ἀμφί about (cf. AS. beseón to look about). √203.  Cf. By, Amb-.] A prefix, originally the same word as by; joined with verbs, it serves: (a) To intensify the meaning; as, bespatter, bestir. (b) To render an intransitive verb transitive; as, befall (to fall upon); bespeak (to speak for). (c) To make the action of a verb particular or definite; as, beget (to get as offspring); beset (to set around).
1913 Webster
It is joined with certain substantives, and a few adjectives, to form verbs; as, bedew, befriend, benight, besot; belate (to make late); belittle (to make little). It also occurs in certain nouns, adverbs, and prepositions, often with something of the force of the preposition by, or about; as, belief (believe), behalf, bequest (bequeath); because, before, beneath, beside, between.
    In some words the original force of be is obscured or lost; as, in become, begin, behave, behoove, belong.
1913 Webster
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