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Vocabulary

language culture Maturity 11-13 Next article →

A vocabulary, also called a lexicon, is a set of words used in a language. It is a fundamental part of communication. We use it to convey thoughts, emotions, and complex information. Vocabulary is not limited to single words. It also includes multi-word units like collocations and idioms. These are groups of words that often go together.

Researchers categorize word knowledge into two main types. The first is receptive vocabulary, also known as passive vocabulary. These are words you recognize when you hear or read them. The second is productive vocabulary, or active vocabulary. These are words you use regularly in speech or writing. Usually, a person's receptive vocabulary is much larger than their active one. For example, a young child might understand many spoken commands. However, their active vocabulary may still be zero because they cannot yet speak.

Knowing a word involves many different layers of understanding. This is often called the degree of knowledge. A word enters your vocabulary through several stages. You might first encounter a word without knowing it. Later, you might hear it and recognize it through context or tone. Eventually, you may understand the meaning but struggle to explain it. Finally, you become fluent with the word and its definition.

Deep word knowledge involves nine specific facets. These facets include orthography, which is the written form. Phonology is the spoken form of the word. Reference involves the concept the word represents. Semantics refers to the actual meaning. Register is the appropriateness of use in different situations. Collocation involves lexical neighbors or word associations. Syntax is the grammatical function. Finally, morphology involves understanding different word parts.

Vocabulary grows through different methods throughout a person's life. Children build their initial vocabulary through instinct and imitation. They associate sounds with objects and actions. As they learn to read and write, they discover language irregularities. A child in first grade who reads may know twice as many words as a non-reader. This gap often persists as they grow. Adults continue to expand their lexicons through reading and word games. Between the ages of 20 and 60, people learn about 6,000 more lemmas. This is roughly one new word every other day.

Measuring vocabulary size is difficult because definitions vary. One common method uses lemmas. A lemma is the dictionary form of a word, like "walk." This does not include variations like "walked" or "walking." Another method uses word families. A word family includes all words derived from a base, such as "effort" and "effortless." Depending on the definition, estimates of vocabulary size range from 10,000 to 200,000 words. A 2016 study found that 20-year-old English speakers know about 42,000 lemmas on average.

Vocabulary is a major focus in many scientific fields. Linguists study the structure of words and language. Psychologists use vocabulary as a measure of cognitive development. It can serve as an indicator of intellectual ability. Vocabulary tests are often used in neuropsychological assessments. In artificial intelligence, researchers study how machines process these symbols. Understanding vocabulary is also essential for education. It directly impacts reading comprehension and academic success.

Finally, vocabulary is deeply connected to how we live. The philosopher Richard Rorty called this a "final vocabulary." He believed humans use a specific set of words to justify their lives. We use these words to express praise, doubt, and hope. These words represent the limit of our language. Beyond them, we may feel helpless. Vocabulary is more than just a list of terms. It is the tool we use to define our world.

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