Vocabulary refers to the collection of words and phrases that a person understands and uses in a language. It includes both the words we know the meaning of and the words we can use to express ourselves. 

Vocabulary learning is crucial because it plays a fundamental role in effective communication. When we have a rich vocabulary, we can express our thoughts, ideas, and emotions more precisely and accurately. It helps us understand and interpret the messages we receive from others, as well as express ourselves in a way that others can understand.

This is a list of all of the vocabulary topics and lessons we have: