tashlik
noun
tash·lik
variants or tashlich
ˈtäshliḵ
plural -s
: a symbolic propitiatory rite that is celebrated by Orthodox Jews traditionally on the afternoon of Rosh Hashanah and that consists in assembling along the banks of a running stream, reciting Micah 7:18–20 and penitential prayers, and shaking one's garments as if casting one's sins into the water to be washed or swept away
Word History
Etymology
Hebrew tashlīkh thou will cast (as in Micah 7:19), 2d singular imperfect or hishlīkh to cast