So how can you use this knowledge? It is simpler than you think. You do not need special or expensive books to introduce your child to new words.
Start at the library. Pick out books on topics your child is curious about, like construction sites, ocean animals, or faraway places. These stories will naturally contain specific, interesting words you might not use in your kitchen.
When you come across a new word, you do not need to stop for a formal definition. Simply reading it clearly in the context of the sentence is often enough. Exposure is the goal, not a quiz. If your child does ask what a word means, you can offer a simple explanation.
This is also a place where a book made just for them can be special. A story about a child's own experience, like their first day of school or a visit to their grandparents, can use new 'feeling' words in a way that is deeply personal and easy to understand. It connects a richer vocabulary directly to their own life.
The simple action for this week is to find one book about something new. See what words you discover together.