English Language Arts
Grade 3
15 min
Determine the meanings of words with prefixes and suffixes: review
Determine the meanings of words with prefixes and suffixes: review
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Introduction & Learning Objectives
Learning Objectives
Identify the prefix and suffix in a given word.
Define the meanings of common prefixes like 're-', 'un-', and 'pre-'.
Define the meanings of common suffixes like '-ful', '-less', and '-ly'.
Separate a word into its parts: prefix, root word, and suffix.
Combine the meaning of a root word and an affix to determine the meaning of a new word.
Use their knowledge of prefixes and suffixes to understand new words they encounter while reading.
Have you ever thought of words like building blocks? 🧱 Let's review how you can add small blocks to the beginning or end of a word to build a whole new meaning!
In this lesson, we will review prefixes and suffixes, which are special word parts that change a...
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Key Concepts & Vocabulary
TermDefinitionExample
Root WordThe main part of a word that holds the most important meaning. It can stand on its own.In the word 'unhappy', the root word is 'happy'.
PrefixA word part added to the BEGINNING of a root word. It changes the word's meaning.The prefix 'un-' means 'not'. Adding it to 'happy' makes 'unhappy', which means 'not happy'.
SuffixA word part added to the END of a root word. It changes the word's meaning or its part of speech.The suffix '-ful' means 'full of'. Adding it to 'help' makes 'helpful', which means 'full of help'.
AffixThe name for any word part added to a root word. Prefixes and suffixes are both types of affixes.'re-' a...
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Key Rules & Conventions
The Prefix Formula
Prefix + Root Word = New Word
A prefix always attaches to the front of a root word to change its meaning. For example, 're-' (again) + 'play' (to play) = 'replay' (to play again).
The Suffix Formula
Root Word + Suffix = New Word
A suffix always attaches to the end of a root word. It can change the meaning or the type of word it is (like changing an action word to a describing word). For example, 'hope' (a feeling) + '-ful' (full of) = 'hopeful' (full of hope).
Spelling Change Rule
Sometimes the root word's spelling changes when you add a suffix.
Be careful! If a root word ends in 'y', you might change it to an 'i' before adding a suffix (happy + -ness = happiness)....
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Challenging
The new water bottle was advertised as `unbreakable`. What does this word mean?
A.It is easy to break.
B.It is not able to be broken.
C.It has already been broken.
D.It can be broken again.
Challenging
In which word does the prefix `re-` NOT mean 'again'?
A.Rewrite
B.Reappear
C.Remember
D.Retell
Challenging
Adding the prefix `dis-` to the word `honest` creates the word `dishonest`. This changes the meaning to its...
A.opposite.
B.past.
C.plural.
D.comparison.
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