In-depth (adjective)

1. Involved with or concerned with a subject in great detail.
2. Extensive and thorough in treatment of a subject.
3. Going into great detail and analyzing all aspects of a subject or problem.

Origin:

Compound word from in- ("in") + depth ("dept.h")

Examples:

1. An in-depth analysis of the market trends.
2. An in-depth interview with the CEO.
3. The in-depth research provided valuable insights.
4. The in-depth examination revealed the root cause of the problem.
5. The in-depth study of the topic took many months.