Lewis & Short

Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.

hypŏthēca, ae, f., = ὑποθήκη, a pledge, security (esp. of immovable things; whereas pignus is used of movable things; cf. also: arra, arrabo), a mortgage, Just. Inst. 4, 6, § 7; Dig. 13, 7, 9; 20, 1, 2 et saep. (in Cic. Fam. 13, 56, 2, written as Greek).
Hence, hypŏthēcārĭus, a, um, adj. [hypotheca], of or relating to a mortgage: actio, Dig. 20, 4, 1 fin.: creditor, id. 42, 7, 1.