The prefixes, e- and ex-, indicates out, away, out of or outside. Note: the prefix ex- can also mean former, e.g., ex-president. Words with the Prefix E- and Ex- Word Definition eave the lower edge of a roof that sticks out past the wall ebb to flow out or away eccentric not of
Prefixes are found at the beginning of a word; they are small but meaningful groups of letters that when added to the front or base of a word they contribute to the meaning of the word.
Knowing the meaning of prefixes will assist a child when encountering unknown words, it helps a child comprehend the meaning of word.
Most Common Prefixes
The following 20 prefixes are commonly used; representing approximately 97%.
|1||un||not, opposite of||uneasy, unhappy & unheard|
|2||re||again, back||return, restore & reset|
|not, opposite of||incomplete, impossible,
irregular & illegal
|4||dis||not, opposite||discomfort, disconnect & discover|
|5||en, em||cause to||endanger, enlarge & enjoy|
|6||non||not, opposite of||nonprofit, nonliving & nonessential|
|7||in, im||in or into||indulge, inflame & impact|
|8||over||too much, above||overtime, overweight & overthrow|
|9||mis||wrongly||misfit, misspell & misstep|
|10||sub||under, lower||subway, submerge & subsoil|
|11||pre||before||predict, prehistoric & preface|
|12||inter||between, among||intervene, interactive & international|
|13||fore||before||forefront, foreman & foresee|
|14||de||opposite of, down||decrease, defrost & deform|
|15||trans||across||transatlantic, transfer & transport|
|16||super||above, beyond||supermarket, supernatural & supersonic|
|17||semi||half||semicolon, semifinal & semicircle|
|18||anti||against||antisocial, antidote & antibody|
|19||mid||middle||midway, midsummer & midwinter|
|20||under||too little, below||underclothes, undercooked & underdog|
Source: Fry, E.B., Ph.D. & Kress, J.E., Ed.D. (2006). The Reading Teacher’s Book of Lists 5th Edition. San Francisco, CA: Jossey Bass.