noun which may take the genitive case particle 'no', noun
undisposed; unsettled; unfinished; undivided
Used in financial, legal, or administrative contexts to describe matters, assets, or profits that have not yet been dealt with, settled, or distributed. Often appears as a modifier with の.
Undisposed profits are carried forward to the next term.
There are still several unsettled matters remaining.
未解決 means 'unresolved' or 'unsolved', typically for problems or cases, whereas 未処分 is more about administrative or financial disposition.
Compound of 未 (mi, 'not yet') and 処分 (shobun, 'disposal, dealing with'). The exact historical derivation is uncertain, but the meaning follows directly from its components.