of-cyrf
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.
of-cyrf
AddSe abbod brúce ísene ofkyrfes abba utalur ferro abscisionis, R. Ben. I. 60, 2. Seó ród is wíde tódǽled mid gelómlicum ofcyrfum tó lande gehwilcum, Hml. S. 27, 144.
This is a supplementary entry with editorial changes to an entry in the main volume of the dictionary. Look under the 'Possibly connected entries' below, or for the same headword in the list to the left.

A Combined List of Abbreviations.

Abbreviation not recognized. See:

A Combined List of Abbreviations.