弟子入り
でしいり becoming a pupil (of); becoming an apprentice
Why it means this
弟子 (a disciple) + 入り (entering) — becoming a master's pupil or apprentice.
Breakdown
- 弟 おとうと younger brother, faithful service to elders
- 子 こ child, sign of the rat, 11PM-1AM
- 入 ニュウ enter, insert
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