Of or pertaining to Arabs and their nations.

A Semitic person, whose forebears were from Arabia / An inhabitant of Arabia or the Arab world / A member of an Arabic-speaking community / An Arabian horse. / (archaic) A street Arab.

The language of the Aramaeans from the tenth century BC: often called Old Aramaic.

Referring to the Aramaic language, alphabet, culture or poetry.

An Aramaean.

Of, relating to, or resembling a tree. / Living in or among trees. / Covered or filled with trees.

Any tree-dwelling creature.

(architecture) An arch whose span is not at right angles to the face.

A person appointed, or chosen, by parties to determine a controversy between them; an arbitrator.

(transitive) To act as arbiter.