Here are definitions and explanations for the terms you've listed from the lessons:
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Context clues (Lesson 2) – Hints or information provided within a text that help readers deduce the meaning of unfamiliar words. Context clues can be in the form of definitions, examples, antonyms, or explanations that surround the unknown word.
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Synonym (Lesson 3) – A word that has the same or nearly the same meaning as another word. For example, "happy" is a synonym for "joyful."
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Prefix (Lesson 4) – A group of letters added at the beginning of a word to modify its meaning. For example, the prefix "un-" means "not," so "happy" becomes "unhappy."
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Suffix (Lesson 4) – A group of letters added at the end of a word that alters its meaning. For instance, adding the suffix "-ing" to "walk" forms "walking."
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Root (Lesson 4) – The base part of a word that carries its primary meaning, to which prefixes and suffixes can be added. For example, the root "bio" means "life," as seen in words like "biology" and "biography."
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Dictionary (Lesson 5) – A reference book or online resource that provides definitions, pronunciations, etymologies, and usages of words in a language. It is often organized alphabetically.
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Etymology (Lesson 7) – The study of the origin of words and how their meanings and structures have evolved over time. It explores the history and development of words in various languages.
Feel free to ask if you need further clarification or examples!