三尺去って師の影を踏まず

さんじゃくさってしのかげをふまず

expression

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a student must never forget to honor their teacher (honour)(proverb)

三	three
尺	shaku, Japanese foot, measure, scale, rule
去	gone, past, quit, leave, elapse, eliminate, divorce
師	expert, teacher, master, model, exemplar, army (incl. counter), war
影	shadow, silhouette, phantom
踏	step, trample, carry through, appraise, evade payment