未完成|みかんせいmikansei[2]nakadaka (mid-high)

1. no-adjective, na-adjectiveincomplete; unfinished; imperfect
   私の仕事しごとはまだ未完成みかんせいです。↗

   My work is not complete yet.

• Related不完全ふかんぜんNeutralRefers to something imperfect or defective, as in 「不完全燃焼」; stresses a lack or flaw, and need not be a work still in progress.
• Related未解決みかいけつNeutralA problem not yet solved, as in 「未解決事件」; applies to issues and questions, not to works or construction projects.
• Related宙ぶらりんちゅうぶらりんCasualColloquial. Literally dangling in midair; figuratively a matter left hanging or in limbo, stressing the awkward in-between state; 「未完成」 just means not yet finished.
• Antonym完成かんせいNeutralAntonym: completion, being fully finished or completed. The direct opposite of 「未完成」, which describes something not yet complete.

Use 「未完成」 for works or projects not yet finished, as in 「未完成の交響曲」. For something flawed or defective say 「不完全」, for an unresolved problem 「未解決」, and colloquially for a matter hanging in limbo 「宙ぶらりん」; the antonym is 「完成」.

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

1. まだ完成かんせいしていないこと。また、そのさま。