Conclude (verb)

1. Bring to an end.
2. Decide or determine as a result of reasoning or evidence.
3. Make a final statement or judgment about something.

Origin:

Late middle english (in the sense "bring to a close"): from latin concludere, from con- "together" + claudere "to shut".

Examples:

1. He concluded his speech with a quote from Shakespeare.
2. The meeting concluded with a vote.
3. She concluded from her research that the company was not responsible for the accident.
4. He concluded that he was not ready for the job.
5. I conclude that there's no point in continuing this discussion.