The Homeric Greek word ἔθος
Word ἔθος
ě. tʰ o ς
IPA etʰos
Meaning custom, habit
Synonyms ἁγέομαι, δίκη, νόμος

Comments
Iliad

Other words that might be of interest
ἄρος ‘use, profit, help’, δίκαιος ‘observant of custom’, ὄνησις ‘use, profit, advantage’