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Prefixes, Suffixes, and Word Families
Transcript of Prefixes, Suffixes, and Word Families
The most important part of the word
Gives the basic meaning
A group of letters added to the beginning of a word
Changes the meaning of the word
A group of letters added to the end of a word
Often changes the word's part of speech
Learning the meanings of common roots, prefixes, and suffixes will increase your vocabulary and help you deduce the meaning of unknown words.
The prefix un-
Un- = "not"
un- + happy = unhappy
Used to change positive adjectives into negative ones
Un- = "do the opposite of"
un- + lock = unlock
"Do the opposite of lock"
Describes the opposite action of the original verb
The suffixes -er, -or, -ist, -ian
Meaning: "someone who"
We usually add -er or -or to the end of a verb
dance + -er = dancer ("someone who dances")
act + -or = actor ("someone who acts")
We add -ist or -ian to the end of a noun, usually an instrument, profession, or area of study.
guitar + ist = guitarist ("someone who plays the guitar")
computer science + -ist = computer scientist ("someone who studies computers")
library + -ian = librarian ("someone who works in a library")
The prefix dis-
Similar to un-
Dis- + agree = disagree
"Not agree with something" or "the opposite of agree"
Dis - + honest = dishonest
"Not honest" or "the opposite of honest"
For more information on the difference between un- and dis-, copy and paste this link into your web browser and read the article.
Prefixes, Suffixes, and Word Families
Learning Module #2
The prefix non- and the prefix re-
Non- = "not"
Usually added to adjectives and nouns
The new word means the opposite of the root word
Non- + verbal = nonverbal
Re- = "again
The second most common prefix in English
Re- + read = reread
Now, go back to your learning module on Blackboard and complete the assignment for Lessons 1-3.
The suffixes -ful, -less, and -able
Often added to words to make
Noun + -ful/-less = adjective
Noun/verb + -able = adjective
-ful = "full of"
-less = "without"
-able = "capable of", "fit for", or "able to"
use + -ful = useful ("full of use")
use + -less = useless ("without use")
use + -able = usable ("fit for use")
Lesson 4: Suffixes
A suffix is a group of letters added to the end of a root word.
You probably already know several suffixes, including -s, -ed-, -ing, -er, and -est.
learn + ed = learned (simple past)
learn + ing = learning (present progressive)
chair + s = chairs (plural)
slow + er = slower (comparative)
slow + est = slowest (superlative
Some suffixes change a word from one part of speech to another.
Some change the part of speech and the meaning of the word.
quiet + -ly = quietly
adjective -> adverb
thought + -less = thoughtless
noun -> adjective
"pensamiento" -> "sin consideracion"
Now, go to Blackboard to complete the assignment for lesson 5.
The suffixes -ed and -ing
The suffixes -tion and -ment
Lesson 9: Word Families
We add -ed and -ing to some verbs to use them as adjectives
-ed adjectives describe feelings and emotions
-ing adjectives describe a person or thing that causes the emotion
Low test scores
by my test score.
My test score was
Added to verbs to form nouns
create + tion = creation
agree + ment = agreement
Unfortunately, there is no rule to determine which suffix to use, so you'll have to practice memorization or use a dictionary.
Ask youself: what are the characteristics of a family?
What is a
A group of words that look similar and have the same root.
The words have related meanings, but the words are different parts of speech.
Adding suffixes to the root often makes the new words in the family.
Noun Verb Adjective Adverb
fear fear fearful fearfully
globe global globally
Now, go back to Blackboard and complete the assignment for lessons 6-8.
Now, go to Blackboard to finish your final assignment.