rignan
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.
rignan
I a. add: (a α) to cause to fall like rain Hé rínð (ríneþ, Ps. L. pluet) ofer synfulle grýn, Ps. Rdr. 10, 7. Hé rínde (rán, Ps. L.) him heofone hláf pluit illis manna, 77, 24. I b. add :-- Hit swá swíðe rínde hié hæfdon wæter genóg onufan þǽre dúne, Ors. 6, 13; S. 268, 16. II. AddUnmǽte rénas ríndon, Gr. D. 196, 2. Þí geáre manig seah meoloc rínan of heofonum, Shrn. 30, 10. v. regnian.
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A Combined List of Abbreviations.

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A Combined List of Abbreviations.