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harebrained

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The definition of harebrained is something that is reckless or not thought out.

(adjective)

An example of something harebrained is a plan that has no chance of working.

See harebrained in Webster's New World College Dictionary

adjective

having or showing little sense; reckless, flighty, giddy, rash, etc.

See harebrained in American Heritage Dictionary 4

adjective

Foolish; flighty: a harebrained scheme.

Usage Note: The first use of harebrained dates to 1548. The spelling hairbrained also has a long history, going back to the 1500s when hair was a variant spelling of hare. The hair variant was preserved in Scotland into the 18th century, and as a result it is impossible to tell exactly when people began writing hairbrained in the belief that the word means “having a hair-sized brain” rather than “with no more sense than a hare.” While hairbrained continues to be used and confused, it should be avoided in favor of harebrained which has been established as the correct spelling.

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