swǽs-lic
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.
swǽs-lic
Add: — Swá swá betwyh þám módum þe selfe heom betweónum lufiað seó swǽslice híwcúþnes þǽre sóþan lufe gegearwað mycle bældo sicut inter amantes se animos magnum caritatis familiaritas ausum praebet, Gr. D. 250, 8. v. ge-swǽslic.
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.

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A Combined List of Abbreviations.