c. 1600, "infirmity, state of being broken down," from crazy + -ness. Oldest sense is now obsolete. The meaning "state of being flawed or damaged" is from 1660s; that of "mental unsoundness" is from 1755.
crawfish
crawl
crayfish
crayon
craze
craziness
crazy
creak
creaky
cream
creamer
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