fæst
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.
fæst
. III 2. add Swilce hé on fæstre eorðan urne, Hml. Th. ii. 160, 10. IV. AddHé cwæð sió burg wǽre genóh fæst on his hǽlo civitas ad salutem tuta, Past. 399, 25. IV a. of a place that can be shut up :-- Wunion ealle an ánre fæstre wununge omnes in uno conclaui (cf. conclaus, locus conclusus, Corp. Gl. H. 35, 683) atrii, Chrd. 54, 33. v. heorþ-fæst, -híw-fæst, hlid-fæst, hoga-fæst, hoh-fæst, ofer-fæst, un-fæst.
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A Combined List of Abbreviations.