説
This Chinese character means preach, explain.
You can watch how to write this. - (「説」の書き順（筆順）動画 - 漢字書き順辞典)
There are 2 main ways to read this, "とく (説く)" or "せつ".
"説く (とく)" is a verb which means preach.
When this is combined with other Chinese characters, this is often read as "せつ".
For example, "説明 (せつめい)" means explain.
"解説 (かいせつ)" means commentary, explain.
"説得 (せっとく)" means persuade.
There are many unanswered questions in the world, and various theories are being put forward by various scholars.
Such research leads to innovation.
By Higashi-Mikawa Kyōjindō Shujin (東三河狂人堂主人)