un-gemæc
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.
un-gemæc
un-gemæcc. AddSyndon full manega þá þe nǽnegu wundra wyrcað and þonne hweþre nǽron ná ungemæcce (-an, v.l.) þám þe þá foretácnu dóð sunt plerique qui etsi signa non facinnt, signa tamen facientibus dispares nan sunt, Gr. D. 90, 31. Heora ǽgþres méd and geearnung nis náht ungemæcce (ungelíce, v.l. ) on heofonum, 91, 15.
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.