“repair / discipline” in Japanese is 修, read shuu, osa (しゅう, おさ). It is a Grade 5 Kyōiku kanji, taught in year 5 of Japanese elementary school, and appears in words such as 修理 (repair).
What does 修 mean?
自転車を修理する。
Same sound, different character — the classic trap. Compare them side by side: