former reading; old reading
Refers to an earlier or traditional reading of a kanji or classical Chinese text, often contrasted with a newer or revised reading.
The former reading of this kanji is 'satoru', but nowadays it is often read as 'akira'.
ancient teachings; old lessons
Refers to teachings or precepts from ancient times, often in a Confucian or classical context. This sense is less common in modern usage.
He corrected his daily conduct according to the ancient teachings.
Compound of 旧 (former, old) and 訓 (reading, teaching). The exact historical derivation is uncertain, but the word follows standard Sino-Japanese compounding patterns.