مَكْفُولٌ

apparently signifies Guaranteed, or pledged: for, according to IKtt, as is said in the Msb, you say كَفَلْتُ المَالَ as well as كَفَلْتُ بِالمَالِ; meaning I took upon myself the property; became responsible, or answerable, for it; [or I guaranteed it:] or مَكْفُولٌ is better rendered ensured by an acknowledgment of responsibility for it: see an example voce مَرْهُونٌ.