Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
in-sēpărābĭlis, e, adj., that cannot be separated, inseparable (post-Aug.): quaedam inter se, Sen. Ep. 118, 85: societas, Gell. 1, 9, 12.
Comp.: trinitas inseparabilior, Aug. Trin. 15, 23.
Adv.: insēpărā-bĭlĭter, inseparably (post-class.), Macr. Somn. Scip. 1, 22: conexa, Lact. 3, 11.