Why learn about prefixes, suffixes, and roots?• Understanding prefixes, suffixes, and roots can help you to determine the meaning of new and unfamiliar words as you come across them while reading.
Prefixes• A prefix is a group of letters added before a word or base to alter its meaning and form a new word.
The most common prefixes (with their meaning in parenthesis)• dis- (not, opposite of) Ex. disagree, discomfort• in-, im-, il-, ir- (not) Ex. injustice, impossible, illegal, irregular• re- (again) Ex. rewrite, return, repeat• un- (not) Ex. unfriendly, unsure
Suffix• A suffix is a group of letters added after a word or base and form a new word.
The most common suffixes (with their meaning in parenthesis)• -ed (past tense verbs) Ex. jumped, hopped• -ing (present participle) Ex. running, eating• -or, -er (one who) Ex. actor, teacher, driver• -less (without) Ex. fearless, hopeless• -logy (study field of) Ex. biology, geology• -s, -es (more than one) Ex. books, boxes
Root wordsA root is the most basic form of a word that is able to convey a particular meaning.• aud (sound) – Ex. audible, audiotape• bio (life) – Ex. autobiography, biology• meter (measure) – Ex. thermometer, odometer• port (carry) – Ex. transport, portable
To summarize• Prefixes and suffixes are groups of letters added before or after words or roots to form new words with different meanings.• Understanding prefixes, suffixes, and roots can help you to determine the meaning of new and unfamiliar words as you come across them while reading.