ofer-þearf
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.
ofer-þearf
AddÁgan þá yldran on Crístenum folce ðæs oferþearfe, þæt hí heora gingran Gode gestrýnan. Wlfst. 38, 23: 301, 15.
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A Combined List of Abbreviations.

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A Combined List of Abbreviations.