expression, suru verb (irregular)
to be very surprised; to open one's eyes wide in astonishment
Describes a sudden, visible reaction of surprise where the eyes become round. Often used in narrative or descriptive contexts.
彼女はその知らせを聞いて目を真ん円にした。
She opened her eyes wide in surprise at the news.
子供
The children were wide-eyed with amazement at the magic show.