What does arroyo mean?
An arroyo is a steep-sided, usually dry watercourse found in arid and semi-arid regions, most familiar from the American Southwest and northern Mexico. Resembling a small canyon or deep gully cut into soft sediment, it typically carries no water except during heavy rains, when runoff can transform it within minutes into a fast, violent torrent — making flash floods in arroyos a well-known hazard. The term comes from Spanish, where 'arroyo' means a small stream or brook, and English borrowed it during the period of exploration and settlement of the West. Today it functions both as a technical geographic term and as everyday vocabulary in states like New Mexico and Arizona, appearing frequently in local place names such as Arroyo Seco. For writers, 'arroyo' evokes sunbaked desert terrain and the dramatic, unpredictable power of water in dry country.
nounA steep-sided gully or dry creek bed in an arid region that carries water only briefly, during and after rain.
- A steep-banked channel or gully in an arid landscape, usually dry, through which occasional runoff flows.
- (In some usage) the intermittent stream itself flowing in such a channel.
"After the summer storm, water rushed through the arroyo for a few hours before the desert swallowed it again."
"The trail dropped into a sandy arroyo shaded by cottonwoods."
"Heavy monsoon rain sent a wall of water down the arroyo, catching hikers off guard."
Standard English plural; the anglicized form with -s is far more common than the Spanish-style plural.
"Flash floods race through the arroyos of the desert Southwest after summer storms."
An arroyo can be bone-dry one minute and a raging torrent the next — flash floods in these deceptively calm channels are among the deadliest hazards of the American desert.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of arroyo
Arroyo entered English from Spanish, likely in the early 19th century as American explorers and settlers encountered the landscapes of Mexico and what became the southwestern United States. In Spanish, the word means a small stream or brook and traces back to Latin 'arrugia', a term for a mine gallery or shaft that came to denote a water channel, ultimately of uncertain earlier origin. Its closest living relatives are other borrowings from Spanish rather than common English cognates.
Related word forms
How arroyo is actually used
Arroyo is chiefly associated with the southwestern United States and northern Mexico; it appears in place names throughout New Mexico, Colorado, Texas, and California. The word is neutral in register. Because arroyos flood suddenly, they carry a connotation of deceptive danger as much as scenic desert character.
Easily confused with arroyo
A wadi is essentially the same landform but is the term used in North Africa and Arabia; 'arroyo' is its Spanish-derived equivalent used in the American Southwest.