sadar (Malay) comes from Arabic صَدْر, from Classical Persian دفتر, from Arabic دَفْتَر, from Aramaic דפתרא, from Classical Syriac ܕܦܬܪܐ, from Ancient Greek διφθέρα, from Proto-Hellenic dipʰtʰérā.
sadar (Malay): aware; to be conscious; to be aware