صَحْرَاء
ṣaḥrāʾ
Arabic
“The Arabic word for 'desert' named the greatest desert — the Desert Desert.”
Sahara comes from Arabic صَحْرَاء (ṣaḥrāʾ), which simply means 'desert.' So 'Sahara Desert' literally means 'Desert Desert.'
Arabs named it for what it was: the great emptiness, the sea of sand. No further specification was needed — there was only one desert that mattered.
The Sahara is the world's largest hot desert, roughly the size of the United States. It wasn't always desert; rock paintings show it was green and inhabited 10,000 years ago.
English speakers often don't realize the redundancy in 'Sahara Desert.' But technically, just 'Sahara' means desert already.
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Today
Sahara has become synonymous with extreme desert. 'Saharan' means unbearably hot and dry.
The redundancy of 'Sahara Desert' persists — we're saying 'Desert Desert' in two languages.
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