Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
ab-jungo, xi, ctum, 3, v. a. 
- I.  Lit., to unyoke: juvencum, Verg. G. 3, 518.
Hence,  
- II.  Transf., to detach from a thing, to remove, separate: abjuncto Labieno, Caes. B. G. 7, 56: Demosthenes se ab hoc refractariolo judiciali dicendi genere abjunxit, abstained from, * Cic. Att. 2, 1, 3.