cretin: [18] In the Swiss-French dialect of the high Alps the term creitin or crestin (their version of christian) was applied to people suffering from mental handicap and stunted growth – the notion being to emphasize that despite their abnormalities, such people were nevertheless as much human beings as any other ‘Christian’. The word was adopted (via French crétin) as a clinical term for someone suffering from dwarfism and mental retardation as a result of a congenital thyroid deficiency, and was subsequently broadened out, towards the end of the 19th century, as a general disparaging term for a ‘fool’. => christian[cretin etymology, cretin origin, 英语词源]