I learned how to write Arabic figures in math class.

The farmers in this region have some of the most arable land in the country.

Arachnids are a class of joint-legged invertebrate animals, in the subphylum Chelicerata.

Aragon is a region in northeastern Spain.

Aramaic was widely spoken in Palestine during the time of Jesus Christ.

The arbalest was a powerful crossbow used in medieval times.

The arbalist was a powerful weapon used in medieval times.

The arbiter made a fair decision in the dispute.

The arbitrament of the dispute was fair and impartial.

You can choose arbitrarily.