## Meanings
1. a decision or opinion reached after careful thought
2. the end or final part of something
3. the formal completion of an agreement or deal

## Examples
- The board came to the conclusion that the plan would not work.
- In conclusion, I would like to thank everyone for coming.
- The conclusion of the deal took several months.

## Derived Forms
- conclusional
- conclusionary
- counterconclusion
- inconclusion
- misconclusion
- nonconclusion
- subconclusion

## Related Forms
- conclude
- conclusive
- conclusively
- conclusiveness

## Roots and Affixes
- Root: conclusion
- Root: conclūsiō
- Root: *(s)kleh₂w-

## Etymology
From Middle English, borrowed from Old French conclusion, from Latin conclūsiō, from the past participle stem of conclūdere (“to conclude”), from con- + claudō, ultimately from Proto-Indo-European *kleh₂u- (“key, hook, nail”). By surface analysis, conclude + -sion.

## AI Etymology
conclusion is a noun. It is from Middle English, borrowed from Old French conclusion, from Latin conclūsiō, from the past participle stem of conclūdere (“to conclude”), from con- + claudō, ultimately from Proto-Indo-European *kleh₂u- (“key, hook, nail”). By surface analysis, conclude + -sion. Historical forms in the chain include conclusion (Old French), conclūsiō (Latin), and *(s)kleh₂w- (Proto-Indo-European). Current senses include a decision or opinion reached after careful thought, the end or final part of something, and the formal completion of an agreement or deal. Derived forms include conclusional, conclusionary, counterconclusion, inconclusion, and misconclusion. Related words include conclude, conclusive, conclusively, and conclusiveness.

## Topics
- Mind & Cognition
- Register & Style

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