retard

In modern usage, retard is a pejorative term either for someone with a mental disability or for someone who is considered stupid, slow to understand, or ineffective in some way. The adjective retarded is in the same way used for something very foolish or stupid. Because it is now considered offensive, the word is commonly referred to by the euphemisms "r-word" and "r-slur".It was previously used as a medical term. The verb "to retard" means to delay or hold back, and so "retard" became known as a medical term in the late 19th and early 20th centuries to describe children with intellectual disabilities, or retarded mental development. Until the 1960s, the terms moron, idiot, cretin, and imbecile were all genuine, non-offensive terms used, including by psychiatrists, to refer to people with mental intellectual disabilities and low intelligence. These words were discontinued in that form when concerns arose that they had developed negative meanings, with "retard" and "retarded" replacing them. After that, the terms "handicapped" (United States) and "disabled" (United Kingdom) replaced "retard" and "retarded". Disabled is now considered a more polite term than handicapped in the United States as well.

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