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teachings left by a deceased person; last instructions
創業者の遺訓は今も社員に受け継がれている。
The founder's last instructions are still passed down among employees.
祖父の遺訓に従い誠実に生きることを誓った。
I vowed to live honestly following my grandfather's last instructions.
武士の遺訓を記した書物を大切に保管した。
The books recording the last instructions of samurai were carefully preserved.