An Etymological Dictionary of Astronomy and Astrophysics

Lacking sufficient water or rainfall.

Etymology (EN): L. aridus, from arere “to be dry, i.e. burnt up”;
compare with Gk. azaleos “dry,” PIE *as- “to burn, glow”.

Etymology (PE): Kamâb, from Mod.P. kam “little, few, deficient, scarce”

• âb “water”.