noun, na-adjective, noun which may take the genitive case particle 'no'
unsorted; unorganized; pending; incomplete
Describes something not yet sorted, arranged, or processed. Often used for documents, data, tasks, or ideas that are still in a raw or unfinished state.
Unsorted documents are piled up on the desk.
このデータはまだ未整理なので、分析には使えません。
This data is still unorganized, so it cannot be used for analysis.
未処理 emphasizes 'unprocessed' or 'not yet dealt with', while 未整理 focuses on the lack of arrangement or sorting.
Compound of 未 (mi, 'not yet') + 整理 (seiri, 'sorting, organization'). The prefix 未- is productive for forming nouns meaning 'not yet done'.