nabban
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.
nabban
AddNafað ðæs monnes mód nánne gástes freódóm, Past. 265, 2. Hé næfde þæs cræftes hé hine tócwýsan mihte, Hml. S. 31, 1247. Hí næbbað éce gewitnesse, Past. 449, 3, Hié hit tó nánum láðe næfdon, Ors. 1, 10; S. 48, 13. Hý tó Gode næfdon náþer ne lufe ne ege, Wlfst. 10, 5. Nabbe (næbbe, v. l. ) gé nánne gemánan wið hine, Past. 357, 5.
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.