青は藍より出でて藍より青し（あおはあいよりいでてあいよりあおし）

Japanese vocabulary

Meaning: the student has become the master; blue dye comes from the indigo plant and is bluer than indigo

See it used in real works

• Example sentences from Japanese novels & web fiction (Massif)
• Hear “青は藍より出でて藍より青し” pronounced in real videos (YouGlish)