Exhaustive (adjective)

1. Involving or considering all elements or aspects; thorough and complete.
2. Extremely tiring; draining.

Origin:

Late 16th century: from french exhaustif, -ive or late latin exhaustus "worn out" + -ive.

Examples:

1. The report was an exhaustive study of the problem.
2. The research was exhaustive and took many months.
3. It was an exhaustive search for the missing child.
4. He gave an exhaustive explanation of the process.
5. The workout was exhaustive and left him feeling drained.