n. The quality of being irresolvable; irresolvableness. [ 1913 Webster ]
a. [ Pref. ir- not + resolvable. Cf. Irresoluble. ] Incapable of being resolved; not separable into component parts. [ 1913 Webster ]
Irresolvable nebulæ (Astron.),
n. The quality or state of being irresolvable; irresolvability. [ 1913 Webster ]
adv. Without settled determination; in a hesitating manner; doubtfully. [ R. ] [ 1913 Webster ]