singal
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.
singal
II. add: 1. of a person or action, assiduous, unremitting Micelum framaþ gebed rihtwíses singal (assidua ), Scint. 30, 14. On bebodum his syngal (assiduns) beó þu, 66, 11. On hálgum spǽcum singal, 220, 2. Singalre crebra (lectionis assiduitate), An. Ox. 11, 163. Ðæt mód ðætte næfð singale sorge hit self tó behealdanne si a circumspectionis sollicitudinecor desiituitur, Past. 431, 8. 2. of other things Singal perpes, An. Ox. 508. III. AddFram swá miclum cwylmnessum and swá singalum (diutinis ) onlýsed beón, Bd. 4, 9; Sch. 396, 11.
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A Combined List of Abbreviations.

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A Combined List of Abbreviations.