loose end

noun

/ˌluːs ˈend/

[usually plural]Idioms

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a part of something such as a story that has not been completely finished or explained（故事等的）悬念，未了结的部分，未交代清楚的情节
- The play has too many loose ends.这部剧有太多地方未交代清楚。
- There are still a few loose ends to tie up (= a few things to finish).还有几件小事需要了结。
- The author tied up all the loose ends of the story in the final chapter.作者在最后一章对故事中所有未了结之处作了交待。

Idioms

at a loose end (British English)

(North American English usually at loose ends)

(informal) having nothing to do and not knowing what you want to do无所事事；无事可做
- Come and see us, if you're at a loose end.你要是闲着无事就来我们这儿坐坐吧。