Definition of nut

The origins of the word "nut" date back to Old English, around the 9th century. The word "hnutu" referred to a walnut, which was a common fruit in England at the time. This Old English word is believed to have been derived from the Proto-Germanic word "*kntiz", which also meant walnut. Over time, the spelling and meaning of the word evolved, and by the 14th century, "nut" had become a general term for any type of fruit with a hard shell, such as almonds, hazelnuts, and chestnuts. Today, "nut" is used to describe both the fruit and theσπdecoded structure that houses the fruit.