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Use "unwashable" in a sentence
"A giant unwashable fuzzy E.T. with a finger covered in vagina goo."
"Laundry increased, because heretofore the materials that people wore were unwashable -- woven woolen goods, felts, and leather."
"The lobby was a time capsule of scratched and unwashable glass walls, clunky tubular gilt railings, molded plastic seats, and golden frames on the walls that advertised nothing."