um suff
noun
u̇mˈsüf
plural -s
: a wiry grass (Vossia procera) that is found in the Nile and often makes up a considerable part of the river's sudd
Word History
Etymology
Arabic umm ṣūf sudd, literally, mother (i.e., source) of wool, from ṣūf-al-baḥr, a maritime plant, literally, wool of the sea