High frequency words refer to:

High frequency words refer to the most common words in the English language. These words are generally those that appear frequently in spoken and written texts, making them essential for basic comprehension and communication. They often include articles, pronouns, prepositions, and conjunctions, which serve as the building blocks of sentences. An understanding of high frequency words is crucial, especially for early readers and language learners, as they help facilitate fluency and comprehension in reading and conversation.

While the other options describe various aspects of language, they do not accurately define high frequency words. For instance, some words may be difficult or less common, but that categorization does not align with the concept of frequency. Similarly, words that are often mispronounced can be common or rare and do not pertain to their usage frequency. Therefore, the emphasis on commonality is what makes the identification of high frequency words critical for language acquisition and effective communication.