Formal, literary term for instructing or giving moral guidance. Rare in everyday language; more common synonyms include 教え導くこと or 指導.
In classical literature, scenes where a master imparts guidance to a disciple are often depicted.
訓誨 is a literary word that is hardly used in modern times.
Compound of 訓 (instruction, teaching) and 誨 (to admonish, to instruct). The exact historical derivation is uncertain; the spelling is conventionally associated with formal moral instruction.