wédenheortness
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.
wédenheortness
Add: of an animal hors wæs æfter þon stilre þonne hit wæs ǽr þǽre wédenheortnesse (wódnesse, v.l. ante illam insaniam). Se þegn geseah his hors ácyrred fram his wédenheortnesse (wódnesse, v.l. a sua vesania), Gr. D. 78, 12-17.
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A Combined List of Abbreviations.

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A Combined List of Abbreviations.