Fruit comes from Latin, fructus/enjoyment. Vegetable comes from Latin, vegetare/enliven. Middle English also makes a distinction. fructus is like sugar/sweet. vegetables give life. Its hard to explain meanings that change over time and distance. To me: fruits are sweet and vegetables are not. Both are from plants and grow on different types of plant structures and are different parts of the plant. There always seem to be too many exceptions to the botanical rules we make to distinguish them. We need more classifications to be more accurate in our communications.