Explanation
Commentary
noun, verbal noun, の adjective
Once you've solved a theory, you should be able to give a pretty good explanation of it to somebody else. Makes sense, right?
解説 refers to a detailed and analytical explanation. It's often used when someone, often an expert, provides an in-depth analysis about a topic, like a sports game or news article commentary.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
あの先生の解説はとても分かり易いね。
The teacher’s explanation is really easy to understand.
最後の審判の解説の冒頭で席を立ちました。
I left at the beginning of the commentary on "The Last Judgment."
トーフグの自己資本比率については、後ほど社長が解説します。
As for Tofugu's equity ratio, the president will explain it later.