arroyo
n. C1 Advanced US //ɝˈɔɪoʊ// UK //æɹˈɔɪəʊ// ar·royo
n. a narrow stream or dry riverbed that only flows after it rains. You often see these in dry, rocky areas where water runs quickly after a storm.
n. a narrow stream or dry riverbed that flows only after heavy rainfall. Common in arid and semi-arid regions, it is often characterized by steep banks and a temporary flow of water.
The arroyo ran with water after the heavy summer storm.
Hikers often follow the arroyo to find a shortcut through the desert, though the path can be dangerous during flash floods.
The landscape was defined by a series of deep arroyos, carved by centuries of seasonal rainfall that carved the soft sediment into steep, winding channels.
Borrowed from Spanish arroyo.