conventional morality; traditional morals
Refers to moral standards based on long-standing customs or social conventions, often with a nuance of being outdated or restrictive.
He lived freely, unbound by conventional morality.
There are many works that criticize traditional morals.
Compound of 因習 (conventional practice, old custom) and 道徳 (morality). The exact historical derivation is uncertain, but the term is used to describe morality derived from traditional customs.