the.com/desert oasis

means A fertile, water-fed spot in an otherwise dry, sandy region, often sustained by an underground spring or aquifer reaching the surface.

from 'Oasis' traces back through Latin and Greek to an Egyptian word (rendered in Coptic as something like 'wahe') naming the fertile depressions in the Western Desert — the Greek historian Herodotus and other classical writers picked up the term from Egyptian geography and passed it into European languages. 'Desert' is older and simpler, from Latin 'desertum,' meaning 'an abandoned or deserted place' — the past participle of 'deserere,' to forsake. So the phrase quietly yokes together two borrowed ideas: a land Rome considered forsaken, and a refuge Egypt actually named.