From Old Spanish, from Latin dēsertus, probably taken as an early semi-learned term (the completely inherited/popular result would have been disierto, which was found in a few old texts).
desierto m (feminine singular desierta, masculine plural desiertos, feminine plural desiertas)
- empty (of people)
Semi-learned borrowing from Latin dēsertum.
desierto m (plural desiertos)