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Prefixes

March 18, 2019
Prefixes
Prefixes are the letter/s which sit before a stem to make new words. These letters are also called affixes.
Affixes generally have no meaning by their own but can form meaningful words by sitting before/after the stems. In the case of prefixed words, affixes sit before the stems of the words.  
“A prefix is an affix which is placed before the stem of a word.” – Wilson (2011)
A prefix is “a letter or group of letters that is added at the beginning of a word to change its meaning.” – Merriam Webster.
Example:
  • Prefix = ‘fix’ is a stem and ‘pre’ is a prefix which changes the meaning of the stem and creates a new word.
  • Antibiotic
  • Awake
  • Symphony
  • Hemisphere

List of Common Prefixes:

Prefix
Meaning
Examples
a
on
in
from
up
not
without
aboard (onboard)
asleep (in sleep)
arise (rise from)
awake (wake up)
atheist (not a theist)
apathy (without pathy)
ab
bad
not
abuse (bad use)
abnormal (not normal)
ad
to
adjoin (to join)
ante
before
antedate (before date)
anti
against
opposite of
antiseptic (against septic)
anticlimax (opposite of climax)
auto
self
autobiography (self-biography)
bi
two
bilateral (two sides)
co
with
co-exist (exist with)
de
down
reversal
detrain (down train)
demerit
di
two
dioxide (two oxides)
dia
through
diameter
dis
not
opposite
disallowed (not allowed)
dishonor (opposite of honor)
en
on
in
enact (on action)
encage (in the cage)
ex
out of
former
extract (out of anything)
ex-student
il
opposite of
illegal (opposite of legal)
im
the opposite of
impossible (opposite of possible)
in
the opposite of
inability (opposite of ability)
ir
the opposite of
irrational (opposite of rational)
inter
within
interschool (within the school)
fore
before
foretell (telling before)
hemi
half
hemisphere (half sphere)
homo
like/same
homogeneous (same species)


hyper
beyond/over
hypersensitive (oversensitive)
hypo
under
hypothesis (under thesis)
mal
bad
ill
malpractice (bad practice)
malnutrition (ill nutrition)
mis
bad
misconduct (bad conduct)
mono
single
monologue (single logue)
non
not/opposite
nonsense (opposite of sense)
post
after
postmodern (after modern)
pre
before
pretext (before text)
peri
round
perimeter (round meter)
re
again
regain (again gain)
semi
half
semifinal (half final)
sub
backup/alternate
subway (alternate way)
super
over/beyond
supernatural (beyond natural)
to
this
today (this day)
trans
across
transform (across form)
ultra
beyond
ultramodern (beyond modern)
un
not/opposite
unable (not able)
vice
alternative of
vice-captain (alternative of captain)


Source: Learn Grammar

Prefixes are the letter/s which sit before a stem to make new words. These letters are also called affixes. Affixes generally have no meaning by their own but can form meaningful words by sitting before/after the stems. In the case of prefixed words, affixes sit before the stems of the words.

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