adjective
thorough
THUR-oh/ˈθɜːrəʊ/
Careful and complete, covering all important details.
The inspector makes a thorough check of the cabinet.

Etymology
The underlying image is going all the way through something, from end to end. Applied to work or examination, this became completeness and care that leave no important detail untouched.
In context
the doctor starts the evaluation by taking a complete medical history looking for any previous condition and performing a thorough physical examination
More examples
- She gave the report a thorough reading.
- We need a thorough explanation of the costs.
- His preparation was unusually thorough.
Forms
thorough
thoroughly adverb — completely and carefully
thoroughness noun — careful completeness
Similar words
- complete
- Containing everything necessary.
- meticulous
- Extremely careful about small details.