ágnung
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.
ágnung
Add:I. possession, properly Áhnung possessio , An. Ox. 1321. Ágnungum proprietalibus , 879. II. declaration of owner-ship, v. ágnian, II. Wé cwǽdon sé þe týman scolde ... Swá wé cwǽdon be þǽre ágnunge ylce, Ll. Th. i. 158, 18. II a. proof of ownership :-- Gewritrǽden vel ágnung cyrographum , Wrt. Voc. ii. 137, 70. Þá getǽhte man Wynflǽde hió móste land hyre geáhnian (prove her ownership of the land ). Ðá gelǽdde hió þá áhnunga, Cht. Th. 289, I.
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A Combined List of Abbreviations.

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A Combined List of Abbreviations.