What is a prefix? DEFINITION: A prefix is part of a word. It is the beginning letters of the word that usually mean something. Quite often, if you know Spanish or another language, the beginning syllable can help you to break down (decode) what the word means. This means a lot, especially if you are taking a test

Understanding the meaning of a common prefix can help you to figure out the meanings of new words. Some prefixes, however, have more than 1 meaning. Prefix Meaning Example A- without, less away non- not, without non-renew

Let’s look a few common prefixes MEANING EXAMPLE Auto Self automobile Dis Not disappear Intra Between intravenous Pre Before Precede, prefix Post After Postmortem Postoperative care Sub Under Subway, submarine Syn Same time Synchronize synovial Contra- Against Contradict

Common Prefixes – continued Meaning Example Co- With co-pilot co-teacher In- Into Insert introduce Mono- One Monocycle monovision Tri- Three Tricycle trimester Bi- Two Bicycle Bisecting lines Trans- Across Transport transaction Uni- one Unicycle/ unicorn universe Un Not Unfinished, unprepared

One more list PREFIX MEANING EXAMPLE Re- To do over, again Remove, renew Pre- before preview Mis- Wrong, bad Misbehavior De- Remove, separate Destroy, deforest Multi- Many, multiple Multi-family house Over- Too much of Overeat, oversleep Tele Trans Across Transport Translate Non- Not Non-violent Dis- Not, opposite of discharge Super- Above supervisor

So, now that we have our list, let’s try to figure out some words 1 So, now that we have our list, let’s try to figure out some words 1. tranlate 2. uniform 3. unhappy 4. subterrain 5. misbehavior 6. teleport 7. transact 8. autonomous 9. disappoint 10. interaction

Common prefixes match Match the prefix on the left to the meaning on the right _______ Re-(renew) 1 wrong, bad _______ Pre- (preview) 2. before _______ Mis-(misbehavior) 3. again, back _______ De- (deforestation) 4. eight _______ Tele- (television) 5. one, same, whole _______ Un- (unhappy) 6. remove or reduce _______ Bi- (bi-weekly) 7. twice (two times) _______ Uni- (uniform) 8. far, distant _______ octo-(octopus) 9. many, (usually more than 2) _______ Sub- (subway) 10. under or low _______ Multi- (multiple) 11. not

Common prefixes match Match the prefix on the left to the meaning on the right ___3____ Re-(renew) 1 wrong, bad ___2____ Pre- (preview) 2. before ____1___ Mis-(misbehavior) 3. again, back __6_____ De- (deforestation) 4. eight __8_____ Tele- (television) 5. one, same, whole _11____ Un- (unhappy) 6. remove or reduce __7____ Bi- (bi-weekly) 7. twice (two times) __5____ Uni- (uniform) 8. far, distant ___4___ octo-(octopus) 9. many, (usually more than 2) __10__ Sub- (subway) 10. under or low __ 9___ Multi- (multiple) 11. not

Let’s try another few prefixes that we can review or learn Bi- bi-weekly A. One or the same uni-uniform B. Many, several octo- octopus C. two or twice sub- subway D. very small multi-multiple E. Under, below or low micro-microorganism F. eight