bríw
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.
bríw
AddBriig pulenta , Wrt. Voc. ii. 118, 38. Bríu puts , An. Ox. 53, 35. Bríw wiþ þon ilcan and sealf; Lch. ii. 4, 8. Bríwes tácan is þæt þú wecge þíne fýst swilce þú bríw hrére, Tech. ii. 123, 13. Gebríw wel swíþne bríw mid hwǽtemelwe, Lch. ii. 354, 11. Biíwas and drenceas and sealfa wiþ þǽre ádle, 8, 16.
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A Combined List of Abbreviations.

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A Combined List of Abbreviations.