bláwan
This might be just a supplemental entry adding to an entry in the Main Volume.
Related §§ in Wright's OE Grammar:
In the OE text, the length is:indicated by acute accentsindicated by macronsnot indicated.
bláwan
. I. add: I a. of a place, to have wind blowing in it Seó dene wæs weallende mid lígum on ánre sídan, on óðre sídan mid hagole bláwende búton tóforlǽtennysse, Hml. Th. ii. 350, 9. II. 3. AddBytte bláwan fulle windes. Hml. S. 34, 317. v. geond-bláwan, in-bláwan; lígfám-bláwende.
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A Combined List of Abbreviations.

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A Combined List of Abbreviations.