achinese

from The Century Dictionary.

• Pertaining to Achin (also written Acheen, Atchin, and Atcheen), a territory in the northwestern part of the island of Sumatra.
• A native or an inhabitant of Achin, or the people of Achin.
• The language used by the Achinese, which belongs to the Malayan family, and is written with Arabic characters.
• Also written Acheenese and Atchinese.