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