clever: [13] Clever is rather a mystery word. There is one isolated instance of what appears to be the word in an early 13th-century bestiary, where it means ‘dextrous’, and the connotations of ‘clutching something’ have led to speculation that it may be connected with claw. It does not appear on the scene again until the late 16th century, when its associations with ‘agility’ and ‘sprightliness’ may point to a link with Middle Dutch klever, of similar meaning. The modern sense ‘intelligent’ did not develop until the 18th century. [clever etymology, clever origin, 英语词源]