Indissolubilis, & hoc indissolúbile, pe. cor. Cic.That cannot be diffolued.Nodus indissolubilis. Plini. A knot that cannot be lewsed, or vndone.
Lewis and Short: Latin dictionary
in-dissŏlūbĭlis, e, adj. [2. in-dissolvo], that cannot be dissolved or loosed, indissoluble (in Cic. only in the transf. signif.). I.Lit.: nodus, Plin. 11, 24, 28, 81. —II.Transf., of persons, indestructible, imperishable: quoniam orti estis, immortales esse et indissolubiles non potestis, Cic. Univ. 11, 35; Lact. Opif. D. 4, 6; Hier. in Isa. 3, 6, 9.— Adv.: in-dissŏlūbĭlĭ-ter, indissolubly: nexum, Claud. Mam. Stat. Anim. 2, 2.