thoroughexplanation

noun
UK /ˈθʌrə ˌɛkspləˈneɪʃən/
US /ˈθɜːroʊ ˌɛkspləˈneɪʃən/

A very complete explanation that tells you everything you need to know.

The teacher gave a thorough explanation of how plants grow.


OTHER MEANINGS

2. A careful and detailed account of why something happens.

The scientist offered a thorough explanation of the experiment's results.

3. A full set of reasons or instructions that leaves nothing out.

The manual includes a thorough explanation of each safety step.

4. A clear and complete answer that helps someone understand fully.

Her thorough explanation helped the new students feel confident.