Cruft

According to the Old English Dictionary:

cruft

Substitute for examples:--Cruftas (e written over the a: cf. cruftan (es written over the an), Hpt. Gl. 454, 62) crypte, An. Ox. 2046. Cruftan (so Hpt. Gl. 485, 3) (in) crypta, 3350. Crufte, 4907 (so Hpt. Gl. 518, 77). Crufte (scrufte, An. Ox. 4889) (ad) spelaeum, antrum, Hpt. Gl. 518, 47. [O. H. Ger. chruft crypta, spelunca. From Latin.] cruft