ge-réþru
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.
ge-réþru
Add: Oars for rowing or steering, tackle of a skip Geroeðro, giroedro, geroedra aplustra, Txts. 41, 178. Geréðru, Wrt. Voc. i. 63, 68. Geréþro, ii. 10, 57. Geredro, 7, 5. pá hwíle þe þá rówendas þæs scipes gegearwodon óþre geréðru ðam nautae navis armamenta repararent, Gr. D. 306, 4. [See note on Chr. 891 in Chr. P. ii. 103-5.] v. web-geréþru.
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A Combined List of Abbreviations.

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A Combined List of Abbreviations.