Why is the ninth month called September?
c.1400, crasschen "break in pieces;" with no identifiable ancestors or relatives it probably is imitative. Computing sense is 1973, which makes it one of the earliest computer jargon words. Meaning "break into a party, etc." is 1922. Slang meaning "to sleep" dates from 1943; especially from 1965. Related: Crashed; crashing.
1570s, from crash (v.); sense of "financial collapse" is from 1817, "collision" is from 1910; references to falling of airplanes are from World War I.
any of several rugged fabrics made from yarns that are irregular, firm, strong, and smooth but sometimes raw and unprocessed. Included are gray, bleached, boiled, plain, twill, and fancy-weave crash. The coarsest type is called Russian crash. Linen is generally used for the warp yarn, while linen, jute, or a mixture of linen and jute is used for the filler. Plain weave is normally employed, but twill is sometimes used.