cís
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.
cís
Add: fastidious, squeamish þe lǽs hit seócmódum bróðrum and císum wyrðe tó wlættan ut infirmis mentibus non uertatur in nausiam, Chrd. 23, 9.
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.