Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
inter-lĭgo, 1, v. a. [1. ligo], to bind together: alterno maculas ostro, Stat. Th. 7, 571: (alga) insanas interligat undas, restrains, hinders, Rutil. 1, 539.