This might be just a supplemental entry adding to an entry in the Main Volume.
car-ful
;I.add :-- Ðá dióflu drífað þá cearfullan sáwla tó helle, Verc. Först. 112, 4. II.add :-- Hé weorpeð ðá cearfullan cǽge (the key of hell) in on þá helle, 15.
Cite the scanned version of the original dicionary like this:
Toller, T. Northcote, and Joseph Bosworth. "car-ful." An Anglo-Saxon Dictionary: Based on the Manuscript Collections of the Late Joseph Bosworth : Supplement. Oxford: Clarendon Press, 1921. 76.