adat

noun

Etymology: 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”).

1. Traditional custom or law, in Islamic parts of Southeast Asia.

   “[T]he early-nineteenth-century Padri movement […] was an accelerated programme of religious renewal in West Sumatra, an attempt to cleanse Islam of adat or local customary law and practices.”