When “apple” meant fruit in general
In Old English, æppel (the ancestor of modern apple) could name fruit more broadly than it does today. It was used for tree-grown fruit and could include nuts, while berries commonly had their own word, berige. The boundary was not a modern botanical classification; it reflected familiar ways of naming and grouping things.
That broader sense survives in some old compound names. A word such as earth-apple, for instance, could describe a plant by comparing its edible part to an apple, rather than identifying it as an apple tree. The familiar word was doing more work than simply naming one species.
How the word became more specific
Words often narrow in meaning without anyone deciding to change them. As speakers use separate names for different foods, a general term can become increasingly associated with the item most often called by that name. Over time, apple came to refer primarily to the fruit of the apple tree, while other fruits and nuts acquired or retained distinct names.
The shift is a reminder that everyday words do not map neatly onto scientific categories. For an Old English speaker, “apple” could be a practical label for a kind of edible produce; today, it points to one particular fruit. The word stayed recognizable while the range of things it could name shrank.
