almagest

The story

1. Ancient Greek · derived fromμεγίστη“greatest”
2. Middle Persian · derived from𐭬𐭢𐭮𐭲𐭩𐭪
3. Arabic · borrowed fromاَلْمَجِسْطِيّ“almagest”
4. English todayAlmagest

From Arabic اَلْمَجِسْطِيّ (al-majisṭiyy, “almagest”), with اَل (al-) being the Arabic definite article, from Middle Persian 𐭬𐭢𐭮𐭲𐭩𐭪 (mgstyk /⁠magestīg⁠/), from Ancient Greek μεγίστη (megístē, “greatest”).