noun, noun or participle which takes 'suru'
reflection; reexamination; contemplation
Rare literary term for deep self-reflection or reconsideration. In modern Japanese, 反省 or 内省 are far more common.
彼は過去の行いを省思し、深く悔いた。
He reflected on his past actions and deeply regretted them.
To be seized by a feeling of self-reflection.