Illusion of understanding. What are the reasons for people's misunderstanding?

We communicate through words. But everyone puts their own meaning into the word, and as a result builds their own picture of the world. Take the word "dog". And ask 10 people to say what this word means in their understanding. It is possible that you will find a lot in common in these descriptions, but there will be many differences. Everyone will have their own image in their head. For one, it will be a ferocious bull terrier, for another, an affectionate chihuahua in a collar with rhinestones.