How to say "unsolved" in Japanese

• 未解決みかいけつCommon
  no-adjective, na-adjectiveThe common word for 'unsolved' in the sense of a case, problem, or issue not yet resolved or settled; it also covers matters left pending, such as a crime that remains unsolved.
  ２つの問題もんだいが未解決みかいけつのままであった。↗

  Two problems remained unsolved.
• 未解明みかいめい
  no-adjective, na-adjectiveCovers 'unsolved' in the sense of something not yet explained or made clear, the emphasis being on the cause or answer remaining unknown; it is the less common choice and often means simply 'unexplained'.

Use 未解決 for a case, problem, or issue that remains unresolved, unsettled, or pending; use 未解明 when the point is that something remains unexplained or unclear — it is the less common choice for 'unsolved'.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 未解決みかいけつunsolved
• 未解明みかいめいunexplained