biter-nes
This might be just a supplemental entry adding to an entry in the Main Volume.
Related §§ in Wright's OE Grammar:
In the OE text, the length is:indicated by acute accentsindicated by macronsnot indicated.
biter-nes
Add:I. cf. biter, I. Ðá bieternesse ðǽre wyrte . . . se swæc ðǽre bieternesse, Past. 303, 14-15. II. cf. biter, II. Biternys acerbitas (poenarum), An. Ox. 4816. Ágyld þú mé mid biternesse leán, R. Ben. 22, 19. Þes middangeard flýhþ from ús mid mycelre biternesse, Bl. H. 115, 17. III. cf. biter, III. Biternes accedia, Wrt. Voc. ii. 10, 9. Yfel biternesse anda, R. Ben. 131, 12. v. ofer-biterness.
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A Combined List of Abbreviations.