samūm

Arabic samūm came from the root samma, to poison. A samūm was a poisoning wind — the scorching, sand-laden blasts that sweep across the Arabian Peninsula, North Africa, and the Middle East, typically in spring and summer. Temperatures in a simoom can reach 54°C (130°F), with humidity dropping to near zero. Historically, travelers caught in the open during a simoom could die from hyperthermia and dehydration.

Classical Arabic literature is full of simoom accounts. The 8th-century poet Al-Farazdaq used simoom as a metaphor for devastating attack. Medieval Arab geographers catalogued the seasonal simoom patterns across different regions. The wind's character — sudden, extreme, sand-carrying — made it one of the most dangerous natural hazards for caravans crossing the Peninsula.

European travelers began describing the simoom from the 16th century onward. Thomas Shaw, a British chaplain who traveled in North Africa in the 1720s, gave one of the first systematic English descriptions. James Bruce's 1790 account of his travels in Ethiopia included a dramatic simoom encounter. By the early 19th century, simoom was established in English meteorological and travel literature.

Simoom remains the standard term for these winds in English. Related wind names from the region — sirocco (Italian adaptation of Arabic sharq, east), khamsin (Arabic for fifty, the days the wind blows), and haboob (Arabic habb, to blow) — all entered English through the same route: travelers naming what they encountered.