1.
incomplete, unfinished
The state of something not yet being completed. Used for works of art, buildings, projects, and other things that are still in progress or were left unfinished.
この作品は未完成だ。
This work is unfinished.
未完成のまま放置されている建物がある。
There is a building that has been left unfinished.
シューベルトの「未完成」は二つの楽章しかないが、世界中で愛されている名曲だ。
Schubert's 'Unfinished' has only two movements, but it is a masterpiece beloved around the world.
USAGE:
未完成 can function as a noun (未完成のまま "while still unfinished") or as a na-adjective (未完成な作品 "an unfinished work"). The noun usage is more common.
COMMON COLLOCATIONS:
- 未完成のまま: left unfinished
- 未完成の作品: unfinished work
- 未完成の建物: unfinished building
- まだ未完成だ: it's still incomplete
CONTRAST:
未完成 (incomplete) is the opposite of 完成 (completion, finished). The prefix 未 indicates "not yet" and appears in many similar words: 未定 (undecided), 未来 (future/not yet come), 未熟 (immature).