Lewis Short
(adjective) : in-sēpărābĭlis, e
* 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.
Charlton T. Lewis, Charles Short, A Latin Dictionary