Development, Illumination, Education, Inspiration
Noun and する verb
けいはつ
最近は、自己啓発本ばかり読んでいます。
Lately I’ve only been reading self-improvement books.
When you are enlightened enough you'll need to make your departure from this world into enlightenment.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.