What is vocabulary in English?

Vocabulary is the set of words you know and use. For speaking, the most useful vocabulary is high-frequency words and phrases you can use in many situations. Learning words in full sentences and in conversation helps you remember and use them.

Building vocabulary for speaking

Focus on words you'll actually say: daily routines, work, hobbies, feelings. Learning words in phrases (e.g. 'make a decision', 'take a break') is more useful than single words. Rozy lets you use new vocabulary in real dialogue and get feedback.

Vocabulary and fluency

The more words you can recall quickly, the easier it is to keep speaking. Practising in conversation—with an AI or a partner—forces you to retrieve words under pressure, which strengthens memory.

Frequently asked questions

What is vocabulary?
The words (and phrases) you know and can use. For speaking we care most about the vocabulary you can produce quickly.
How many words do I need to speak English well?
Around 2,000–3,000 word families cover most everyday conversation. Quality of use matters more than a huge list; practise using a smaller set well.
How can I practise vocabulary in speaking?
Use new words in full sentences when you talk. Rozy lets you have conversations on different topics so you recycle and reinforce vocabulary.
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