Indissoluble
131indissolubility — (n.) 1670s, from INDISSOLUBLE (Cf. indissoluble) + ITY (Cf. ity) …
132indissolvable — a. See indissoluble, in all its senses. [In Indissoluble, the sense 2 is unusual, while in Indissolvable, it is the natural and predominant meaning.] …