fyrþrung
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.
fyrþrung
AddFor crístendómes fyrðrunge, Wlfst. 176, 2. Ic on Róme be þes pápan fyrþrunge and leáfe mynster geworhte, Cht. Th. 116, 29. Weder hlúttor gesihð, ceápes ferðrunge hit getácnað, Lch. iii. 198, 17. Buccan gesihð, ferðrunge getácnað, 206, 2. v. scip-fyrþrung.
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.