sǽ-grund
This might be just a supplemental entry adding to an entry in the Main Volume.
In the OE text, the length is:indicated by acute accentsindicated by macronsnot indicated.
sǽ-grund
Add: the deep Se apostol Paulus sǽde hé sylf wunode on sǽgrunde middan ofer dæg and ofer niht (nocte et die in profundo mares fui; a night and a day I have been in the deep, 2 Cor. 11, 25), Hml. S. 31, 899.
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A Combined List of Abbreviations.

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A Combined List of Abbreviations.