be-hwylfan
This might be just a supplemental entry substituting part of an entry in the Main Volume.
In the OE text, the length is:indicated by acute accentsindicated by macronsnot indicated.
be-hwylfan
l. be-hwilfan, and substitute Ne behwylfan mæg heofon and eorðe his wuldres word wíddra and síddra þonne befæðman mæge . . . eorðan ymbhwyrft and uprodor heaven and earth cannot form a vault that shall cover his glory's word, too wide and too ample for the globe and the firmament on high to embrace, Exod. 426.
This is a supplementary entry with editorial changes to an entry in the main volume of the dictionary. Look under the 'Possibly connected entries' below, or for the same headword in the list to the left.

A Combined List of Abbreviations.

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A Combined List of Abbreviations.