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Prefix – is a letter or a group of letters added to the beginning or the stem of the word. For example, the word “unsure” has a prefix “un” which means “not” with a root word “sure.” Hence, the word “unsure” means “not sure.”

Read this important table which contains information and examples about prefixes.

 

PrefixMeaningExampleMeaning of the word
anti-againstantibacterialIntended to kill or reduce the harmful effects of bacteria.
auto-selfautobiographyAn account of a person’s life written by that person.
bi-twobicycleA vehicle with two wheels.
dis-notdisagreeto have a different opinion or be unable to agree.
ex-out, formerexhaleto breathe out air.
il-notillegalagainst the law.
im-notimproperbeing against a law or a rule; dishonest or illegal.
in-notinvisibleimpossible to see.
inter-betweeninterchangeableable to be exchanged with each other.
ir-notirrelevancethe fact that something is not related to what is being discussed or considered.
micro-smallmicrocomputera small computer containing a microprocessor.
mis-wrongmisdirectto send something to the wrong place or aim something in the wrong direction.
mono-onemonogamymarriage with one person.
non-notnonpoisonousnot having the properties or effects of poison.
poly-manypolytheistone who believes in a plurality of gods.
post-later, behindpostgraduatea student who has already received one degree and is studying at a university for a more advanced degree.
pre-beforeprehistoryHistory of humankind in the period before recorded history.
pro-for, forward, beforeproactiveActing in advance to deal with an expected difficulty; anticipatory.
re-againreconstructto construct again; rebuild.
semi-halfsemiconsciousPartially conscious; not completely aware of sensations.
sub-undersubcontractorsomeone who enters into a subcontract with the primary contractor.
tri-threetriathlonan athletic contest in which each athlete competes in three different events: swimming, cycling, and running.
un-notunbelievablenot to be believed; incredible.
uni-oneunisizein one size only, to fit most people of relatively average build.

 

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sources: https://dictionary.cambridge.org, https://www.thefreedictionary.com, www.google.com

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