Borrowed from Aramaic רֵישָׁא / ܪܝܫܐ (rēšā, “head”) in the particular sense of “tip, extremity”, hence doublet of رَأْس (raʔs), whereas unrelated to رِمْش (rimš, “eyelash”), as far as we understand, see it.
Oefen met het spreken en memoriseren van " ريش " en vele andere woorden en zinnen in Arabic .