The document discusses prefixes, base words, and suffixes in words. It provides examples of how prefixes like "un-" and "mis-" can be added to the beginning of base words like "helpful" and "use" to form new words with changed meanings, like "unhelpful" and "misuse." Similarly, suffixes like "-ful" and "-less" can be added to the end of base words or words with prefixes to create new words. The document then lists some of the most common prefixes like "un-", "im-", "in-", and "re-" as well as common suffixes like "-ly", "-ty", "-er", and "-able".

1. Dr. Anshu Page 1
Prefix, Base Word, Suffix
A base word can stand alone and has meaning (forexample,help).A suffix is a word part
added to the end of a word (forexample,-ful).Ifyou add the suffix-ful to the base word, help,
the word is helpful. A prefix is a word part added to the beginning of a word or base
word(for example, un-).If the prefix un- is added to helpful, the word is unhelpful.
Word Prefix BaseWord Suffix
unhelpful un help ful
undo un do
personal person al
misuse mis use
discolored dis color ed
harmless harm less
trainer train er
unsure un sure
remarkable re mark able
fearless fear less
The most common prefixes are as follows.
 A- (abiotic, atypical)
 Un- (undo, unfold)
 Im- (impolite, immature)
 In- (intolerant, indisciplined)
 Il- (illogical, illegible)
 Ir- (irregular, irresponsible)
 De- (decode, destress)
 Re- (redo, reappear)
 Dis- (disinterested, disobedient)
 Mis- (misunderstand, misinterpret)
 Pro- (proactive)
 Sub- (subconscious, substandard)
 Pre- (preset, predetermine)
 Non- (nonexistent, non-violence)
 Anti- (antifungal, antiviral)
 Post- (postmodern, postoperative)
 Inter- (interdependent, interrelated)

2. Dr. Anshu Page 2
The most common suffixes are
 -y (honesty, noisy)
 -ly (quickly, softly)
 -ty (loyalty, sincerity)
 -ry (bravery, mockery)
 -er (larger, brighter)
 -al (parental, bacterial)
 -est (fastest, biggest)
 -age (usage, breakage)
 -ing (trying, binding)
 -ful (truthful, fruitful)
 -ment (shipment, basement)
 -ness (happiness, blindness)
 -able (bearable, eatable)
 -ible (sensible, convertible)
 -less (fearless, baseless)
 -ship (friendship, internship)
 -hood (parenthood, brotherhood)
 -sion (conversion, invasion)
 -tion (invention, exhibition)