How to Build Your Child’s Vocabulary: 9 Ways That Work
Children build vocabulary fastest through lots of rich conversation and being read to, because books and adult talk use words they rarely meet elsewhere. On top of that, a few deliberate habits make a big difference: explaining interesting words when they come up, revisiting them several times, teaching word parts like prefixes and suffixes, and playing word games. Vocabulary is one of the strongest predictors of reading comprehension, so it's worth the effort.
Why vocabulary matters so much
To understand a sentence, children need to know almost all the words in it. A child who knows many words reads more easily, enjoys reading more, reads more, and so learns even more words. A child with a smaller vocabulary can get stuck in the opposite cycle. Vocabulary also shapes writing, because children can only use the words they know. The good news: it can grow at any age.
1. Talk more, and talk richly
Everyday talk is the foundation. Describe what you're doing, think aloud and use precise words: not just “big” but “enormous”, “towering” or “bulky”. Ask open questions and give your child time to answer. Dinner, walks and car trips are perfect moments.
2. Keep reading aloud
Read to your child well past the age they can read alone. Books you read aloud can be a step above their reading level, so they meet words and sentence patterns they couldn't read yet. Mix stories with non-fiction, which is full of subject words like habitat, predator and erupt.
3. Pause on interesting words
When an unusual word appears, stop briefly. Give a child-friendly explanation and an example: “Reluctant means you don't really want to do something. Like when it's time to get out of a warm bed on a cold morning.” Then keep reading. One or two words per session is plenty, so the story doesn't lose its flow.
4. Choose the right words to teach
Not all words are equally useful. Focus on words that appear across many subjects and books but aren't common in everyday speech.
| Type of word | Examples | Worth teaching? |
|---|---|---|
| Everyday words | happy, run, dog | Usually learnt naturally through talk |
| Useful “book” words | furious, cautious, observe, compare, gradually | Yes. These are the most valuable to teach |
| Subject-specific words | photosynthesis, denominator, peninsula | Teach when the topic comes up |
5. Use new words again and again
Children usually need to meet a word many times, in different places, before it's truly theirs. Use new words in conversation during the week: “I'm feeling a bit reluctant to do the dishes!” Put a “word of the week” on the fridge and award a point every time someone uses it naturally.
6. Explore word families and word parts
Knowing how words are built lets children work out new words on their own. Teach common prefixes like un-, re-, pre- and dis-, and suffixes like -ful, -less, -ness and -ment. Then build families together: help, helpful, helpless, helper, unhelpful. Older children enjoy roots too: tele means far, so telescope, telephone and television all make sense. Prefixes & Suffixes is a good place to practise.
7. Play with words
- Synonym ladder: start with a plain word like “said” and list stronger options: whispered, shouted, muttered, giggled. Talk about how each changes the meaning.
- Shades of meaning: put words in order of strength: warm, hot, boiling, scorching.
- Word association: take turns saying a word linked to the last one, then explain the link.
- Analogies: “Hot is to cold as up is to…?” These stretch thinking and appear in many reasoning tests. Try the Verbal Reasoning Quest.
- Board and card games that involve describing words or making words are great family options.
8. Teach how to work out a word
When your child meets an unknown word while reading alone, teach them a simple routine:
- Re-read the sentence and the ones around it for clues.
- Look for word parts they know.
- Have a guess, then check whether it makes sense.
- If still stuck, ask someone or look it up in a child-friendly dictionary.
This routine also helps comprehension. Our guide on improving reading comprehension has more strategies, and Read & Answer gives short passages to practise on.
9. Widen their world
New experiences bring new words. A trip to a museum, beach, farm or building site is full of vocabulary. Talk before, during and after: “Look, that's a crane. The person who drives it is the operator.” Documentaries, audiobooks and podcasts for children also bring words that daily life might not.
Vocabulary for writing
Encourage your child to use their new words when they write. When editing, ask, “Is there a more exact word for ‘nice’ here?” Keep a small notebook of favourite words they can borrow from. Avoid pushing fancy words just for the sake of it, though. The goal is the right word, not the longest one.
How to tell if it's working
You'll notice your child using new words in conversation, asking what words mean, and understanding more of what they read. Vocabulary grows slowly but steadily, so look back over months rather than weeks.
Frequently asked questions
How can I improve my child’s vocabulary?
Talk with your child often using precise words, keep reading aloud, explain interesting words as they come up, reuse new words during the week, teach prefixes and suffixes, and play word games.
Which words should I teach my child?
Focus on useful “book” words that appear across many subjects but aren’t common in everyday speech, such as cautious, observe, compare and gradually.
How many times does a child need to hear a word to learn it?
It varies, but children usually need to meet a word many times, in different contexts, before they use it confidently. Reusing new words in conversation helps a lot.