the GNU version of the Collaborative International Dictionary of English
n. The quality of being irresolvable; irresolvableness.
The Century Dictionary and Cyclopedia
n. Absence of resolvability; the state or quality of being irresolvable.
Word Usage
"This would require showing that the dispute about the irresolvability of moral disagreements (a metaethical debate) can be rationally resolved in a way that fundamental moral disagreements (substantive normative debates) themselves cannot."