sceþ-wræc
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.
sceþ-wræc
Substitute for the passage Eálá hú swíþe eádge wǽron þá æþelan cennend(ẹ) Sancte Ióhannes, þǽm ne sceþede nǽnig scyld þisse sceþwracan worlde, ne hié nǽnigo firen ne gewundode beati, quos in saeculo isto aliqua culpa non percutit, nullum vulnerat crimen, Bl. H. 161, 31-33.
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.

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A Combined List of Abbreviations.