Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
The word fideiubeo could not be parsed. Trying a normal dictionary lookup:
fĭdĕ-jŭbĕo (also separately fide ju-beo), jussi, jussum, 2, v. n. [fides], jurid. t. t., to be surety or bail, to give or go bail for any one: filiusfamilias pro patre poterit fidejubere, Dig. 46, 1, 10: servus inscio domino pro quodam fidejusserat et eo nomine pecuniam solverat, ib. 19; Ambros. de Tob. 12, 59.
Separate: fidejussores et ita interrogantur: ID FIDE TVA ESSE IVBES? Dig. 45, 1, 75, § 6; cf. Gai. Inst. 3, 115: quare scias, quodcumque ab ea ex hac causa stipulatus fueris, id me mea fide jussisse, ib. 17, 1, 60.
Pass. impers.: pro quibus fidejussum est, Dig. 46, 1, 2: qui fidejusserit, ib. 46, 3, 38 fin.