/ˌmɒnˈsuːn/·noun·English c. 1584, in accounts of Indian Ocean navigation; the word appears in Jan Huyghen van Linschoten's Itinerario (1598 English edition), where 'monsoon' describes the seasonal wind shift that governed the sailing calendar between Arabia, India, and East Africa.·Established
Origin
From Arabic mawsim ('a marked season', from wasama 'to mark'), through Portuguese monção into English monsoon — a word that began as a trade calendar, became a wind, and finally became the rain itself, tracing the full arc of Indian Ocean commerce.
Definition
A seasonal reversing wind system of the Indian Ocean and South Asia, bringing heavy summer rainfall, from Arabic mawsim (season, fixed time) via Portuguese monção.
The Full Story
ArabicMedieval, c. 9th–14th century CEwell-attested
Theword 'monsoon' traces ultimately to the Arabic root w-s-m (و-س-م), from the verb wasama (وسم), meaning 'to mark, to brand, to leave an impression.' From this root came the derived noun mawsim (موسم), literally 'a marked or appointed time' — a fixed season designated for a particular activity. Arab merchants and sailorsnavigating
Did you know?
TheArabic root wasama means 'to brand or mark' — the same verb used for marking livestock. Arab sailorsapplied it to the Indian Ocean's seasonal wind reversal because it was as reliable and distinct as a brand: a fixed, unmistakable division in the year. When Malay tradersborrowed the word directly
maritime trade across the Arabian Sea and Bay of Bengal: northeasterly winds prevailed in winter, southwesterly winds in summer. This predictable cycle
were favorable for a given route. The word entered the vocabulary of Indian Ocean trade as a technical maritime term, carried by Arab dhow captains along the Malabar Coast, the Persian Gulf, and the East African littoral. When Portuguese navigators under Vasco da Gama rounded the Cape of Good Hope and entered the Indian Ocean in 1498, they encountered Arab pilots and merchants already using this seasonal vocabulary. Portuguese absorbed the word as monção (plural monções), integrating it into their colonial maritime lexicon as they established the Estado da India. From Portuguese it passed into Dutch as monssoen and into English as monsoon by the late 16th century, initially retaining the broader sense of 'sailing season' before narrowing to its modern meteorological meaning: the seasonal reversal of wind direction and the rains it brings to South and Southeast Asia. Key roots: w-s-m (و-س-م) (Proto-Semitic / Arabic triconsonantal root: "to mark, to brand, to designate — underlying concepts of marking and designation"), wasama (وسم) (Arabic: "to mark, to brand, to imprint — denoting something fixed or appointed"), mawsim (موسم) (Arabic: "a marked season, an appointed time — specifically the sailing season of the Indian Ocean trade winds").
mousson(French (borrowed from Portuguese monção))Monsun(German (borrowed from Portuguese))monzón(Spanish (borrowed from Portuguese))monsone(Italian (borrowed from Portuguese))mausam (मौसम)(Hindi/Urdu (borrowed directly from Arabic mawsim))musim(Malay (borrowed directly from Arabic mawsim))