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crevasse (n.)

1823, "a fissure or crack in the ice of glaciers in the Alps;" 1814, "a breach in a riverbank" (in this use via Louisiana French), from French crevasse, from Old French crevace "crevice" (see crevice). Identical with crevice, but re-adopted in senses for which the then-meaning of crevice was felt to be too small.