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Prefixes and Suffixes. Base Words. Base words, or root words, is a word that can stand alone. love. decide. understand. sleep. help. take. Prefixes. A group of letters added to the beginning of a base word that changes the meaning of that word. mis - wrongly. re- again.
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Base Words • Base words, or root words, is a word that can stand alone. love decide understand sleep help take
Prefixes • A group of letters added to the beginning of a base word that changes the meaning of that word. mis- wrongly re- again pre- before in- not un- not dis- opposite of
Adding Prefixes to Words (play again) • Re- + play = replay • Un- + lucky = unlucky • Mis- + understand = misunderstand • Pre- + test = pretest • Dis- + approve = disapprove • In- + complete = incomplete (not lucky) (understand wrongly) (to test before) (opposite of approve) (not complete)
Suffixes • A group of letters added to the end of a root word that changes the meaning of that word. -able able to be -ful full of -less without -ly in a way that is -y being -er one who does
Adding Suffixes to Words (full of hope) • Hope + -ful = hopeful • Excite + -able = excitable • Sleep + -less = sleepless • Rapid + -ly = rapidly • Dream + -y = dreamy • Work + -er = worker (able to excite easily) (without sleep) (in a way that is rapid) (being like a dream) (one who does work)