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(another's) son; boy; young master
green young man from a well-to-do family; young man innocent of the ways of the world
隣の家の坊ちゃんは今年小学校に入った。
The boy next door started elementary school this year.
坊ちゃん育ちで苦労を知らないと言われた。
I was told that I was raised in comfort and don't know hardship.
お坊ちゃん、お母様がお呼びですよ。
Young master, your mother is calling for you.