Thorough (adjective)

Complete and exhaustive in every detail, done or performed completely and carefully.

Origin:

From the old english word "þurh" meaning through, meaning complete and exhaustive in every detail, done or performed completely and carefully.

Examples:

1. The detective conducted a thorough investigation of the crime scene.
2. The scientist performed a thorough analysis of the data before publishing her findings.
3. The teacher gave a thorough explanation of the material before the test.
4. The mechanic gave the car a thorough check-up before returning it to the owner.
5. The student gave a thorough presentation on the topic, leaving no question unanswered.