IRRESOLUBLE
Etymology
Adjective
irresoluble (comparative more irresoluble, superlative most irresoluble)
difficult if not impossible to resolve; irresolvable
Source: Wiktionary
Ir*res"o*lu*ble, a. Etym: [L. irresolubilis: cf. F. irrésoluble. See
Resoluble, and cf. Irresolvable.]
1. Incapable of being dissolved or resolved into parts; insoluble.
Boyle.
2. Incapable of being relieved or assisted. [Obs.]
The second is in the irresoluble condition of our souls after a known
sin committed. Bp. Hall.
Source: Webster’s Unabridged Dictionary 1913 Edition