2. The quality of being inexplicable or insolvable.

INSOLUBLE
In*sol"u*ble, a. Etym: [L. insolubilis indissoluble, that can not be
loosed: cf. F. insoluble. See In- not, and Soluble, and cf.
Insolvable.]

1. Not soluble; in capable or difficult of being dissolved, as by a liquid; as, chalk is insoluble in water.

2. Not to be solved or explained; insolvable; as, an insoluble doubt, question, or difficulty.

3. Strong. "An insoluble wall." [Obs.] Holland

INSOLUBLENESS
In*sol"u*ble*ness, n.

Defn: The quality or state of being insoluble; insolubility. Boyle.

INSOLVABLE
In*solv"a*ble, a.

1. Not solvable; insoluble; admitting no solution or explanation; as, an insolvable problem or difficulty. I. Watts.

2. Incapable of being paid or discharged, as debts.