adat

The story

1. Arabic · derived fromعَادَة“habit, custom”
2. Classical Persian · derived fromعادت
3. Malay · borrowed fromadat
4. English todayadat

Borrowed from Malay adat, from Classical Persian عادت ('ādat), from Arabic عَادَة (ʕāda, “habit, custom”), from the verb عَوْدَ (ʕawda, “to appertain, to be proper”).

First known use, by meaning

• from 18th c. Traditional custom or law, in Islamic parts of Southeast Asia.