wadi
Concise Oxford English Dictionary © 2008 Oxford University Press:
wadi /ˈwɑːdi, ˈwɒdi/ (also wady)
▶noun (pl. wadis or wadies) (in Arabic-speaking countries) a valley or channel that is dry except in the rainy season.
– origin C17: from Arab. wādī.
'wadi' also found in these Oxford entries:

