Decoding Using Affixes: dis-, un-, pre- & -less
Basics on the topic Decoding Using Affixes: dis-, un-, pre- & -less
Learn how to decode words with the affixes dis, un, pre, and less with this video.
Transcript Decoding Using Affixes: dis-, un-, pre- & -less
Koko and Pip have been hired as word detectives to solve the meaning of new words that have appeared around town. "I've never seen these words before, Pip. But I do recognize the affixes and root words!" Koko and Pip will solve the case by decoding using affixes: dis, un, pre, and less. An affix is a word part that changes the meaning of a root word. An affix can be a prefix, which goes at the beginning of the root word, or a suffix, which goes at the end of the root word. Today, we will be focusing on the prefixes dis, un, and pre. We will also look at the suffix less! Before we help Koko and Pip, let's review what these affixes mean. Dis means not or none. Un means not. Pre means before. Less means without. Now that we've reminded ourselves of these affix meanings, let's solve some words! Koko and Pip discovered the word unknown. We can split the word into it's root and affix then come up with a definition based on the meaning of each part! The root word, known, means something is familiar. The prefix UN here, means not. Therefore, the complete word, unknown, means something that is not known, or is not familiar! Here is another word Koko and Pip have found around town; endless. We know the root word, end, means something that is finishing. Here is the suffix, less, which means without. We can combine these to define endless as something that is without an end or finish! Koko and Pip have found another word; disagree. What is the root word, and what does it mean? The root word is agree, and it means you have the same opinion. What is the prefix, and what does it mean? The prefix is dis, which means not or none. What does the word disagree mean? Disagree means that you do not have the same opinion. Koko and Pip discover one final word; preheat. Can you figure out the meaning of preheat using the root word and the prefix? The root word, heat, means to warm something up. The prefix, pre, means before. We can say that preheat means to warm something up before using it. While Koko and Pip wrap up the case, let's review it! Remember, you can determine the meaning of words using known affixes and root words. To determine the meaning of these words, first identify and define the root word. Then, identify and define the affix used. Finally, combine the meanings to find the meaning of the whole word. "We are such amazing word detectives, Koko. Nothing gets past us!"
Decoding Using Affixes: dis-, un-, pre- & -less exercise
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Find the affixes.
HintsA prefix comes at the beginning of a word, and a suffix is attached at the end.
In this example, replace is the root word, ir- is a prefix, and -able is a suffix.An affix is a word part that changes the meaning of the root word.
Example: Fair and unfair.There are three prefixes and two suffixes.
SolutionPREFIXES
- Unknown ~ Un
- Disagree ~ Dis
- Preheat ~ Pre
- Endless ~ less
- Hopeless ~less
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Find the meaning of the word.
HintsThe prefix, pre- means before.
Example: Preschool is school that begins at a younger age or before normal schooling.There are two correct choices and three false.
SolutionThese are both possible meanings for the word prepaid:
- Money was paid early
- Part of the cost was paid before the total amount was paid
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Pair affixes and meanings.
HintsHope is a root word. If you add the suffix, -less you have hopeless, meaning without hope.
Preschool is school that begins at a younger age or before normal schooling.
Preheat means to warm something up before using it.Unknown, means not known.
The prefix, dis- has two possible meanings.
SolutionAFFIXES
- un- meaning not.
- dis- meaning not or none.
- -less meaning without.
- pre- meaning before.
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Define words with affixes.
HintsThe definition of the root word determine is to make a decision based on investigation or reasoning.
The definition of the root word aware is to know about a situation or fact.
Another way of saying relaxed could be at rest. What word would mean the opposite of this?
Remember the meanings of the affixes and use this to help you find the definitions of the words.
Solution- Predict means to say what you believe will happen before it actually occurs.
- Unaware means to not notice or know something.
- Restless means not relaxed, agitated.
- Predetermined means decided or established beforehand.
- Dishonest means behaving in an untrustworthy, or insincere way.
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Identify words with affixes.
HintsPrefixes come at the begining of a root word. The prefixes this lesson focuses on are dis-, un-, and pre-.
Suffixes come at the end of a root word. The suffix this lesson focuses on is -less.
A prefix comes at the beginning of a word, and a suffix is attached at the end.
In this example, replace is the root word, ir- is a prefix, and -able is a suffix.There are three words with prefixes, two words with no affix, and one word with a suffix.
SolutionPREFIXES
- Unlikely
- Disappear
- Preview
- Effortless
- View
- Effort
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Find the meaning of the words.
HintsRemember the meanings of the affixes and use this to help you find the definitions of the words.
Look for the prefixes, dis-, un-, and pre-, and the suffix -less. Remove these to find the root word. Then combine this with the meaning of the affix to find the definition of the entire word.
Two or more things that are like one another are similar.
Another way of saying ahead of time could be to say before.
Solution1) The word disprove means to prove something is false.
2) The word unusual means not common or standard.
3) The word meaningless means without purpose or value.
4) The word disobey means to not follow a rule or command.
5) The word prepare means to make things ready ahead of time.
6) The word unlike means different, or not similar.
