deór-fald
This might be just a supplemental entry substituting part of an entry in the Main Volume.
In the OE text, the length is:indicated by acute accentsindicated by macronsnot indicated.
deór-fald
Substitute: I. an enclosure or cage for wild beasts Deórfald cavea, domus in theatro, Wrt. Voc. ii. 129, 64. [II. a deer-park Se king rád in his dérfald, Chr. 1123; P. 251, 5. þis wæs segon on þe selue derfald in þá tune on Burch and on ealle þá wudes, 1127; P. 258, 21.]
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A Combined List of Abbreviations.

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A Combined List of Abbreviations.