agri
field
agronomy
field-crop production and soil management
anthropo
man
anthropology
the study of man
astro
star
astronaut
one who travels in interplanetary space
bio
life
biology
the study of life
cardio
heart
cardiac
pertaining to the heart
cede
go
precede
to go before
chromo
color
chromatology
the science of colors
demos
people
democracy
government by the people
derma
skin
epidermis
the outer layer of skin
dyna
power
dynamic
characterized by power and energy
geo
earth
geology
the study of the earth
helio
sun
heliotrope
any plant that turns toward the sun
hydro
water
hydroponics
growing of plants in water reinforced with nutrients
hypno
sleep
hypnosis
a state of sleep induced by suggestion
ject
throw
eject
to throw out
magni
great, big
magnify
to enlarge, to make bigger
man(u)
hand
manuscript
written by hand
mono
one
monoplane
airplane with one wing
ortho
straight
orthodox
right, true, straight opinion
pod
foot
pseudopod
false foot
psycho
mind
psychology
study of the mind in any of its aspects
pyro
fire
pyrometer
an instrument for measuring temperatures
script
write
hand written
terra
terrace
a raised platform of earth
thermo
heat
thermometer
instrument for measuring heat
zoo
animal
zoology
the study of animals
ante-
before
antebellum
before the war
anti-
against
antifreeze
liquid used to guard against freezing
auto-
self
automatic
self-acting or self-regulating
bene-
good
benefit
an act of kindness; a gift
circum-
around
circumscribe
to draw a line around; to encircle
contra-
contradict
to speak against
de-
reverse, remove
defoliate
remove the leaves from a tree
dis-
apart
dislocate
to unlodge
dys-
bad
dysfunctional
not functioning
ecto-
outside
ectoparasite
parasite living on the exterior of animals
endo-
within
endogamy
marriage within the tribe
ex-
out
excavate
to dig out
equi-
equal
equidistant
equal distance
extra-
beyond
extraterrestrial
beyond the earth
hyper-
over
hypertension
high blood pressure
hypo-
under
hypotension
low blood pressure
in-
in
interim
in between
inter-
between
intervene
come between
intra-
intramural
within bounds of a school
intro-
in, into
introspect
to look within, as one's own mind
macro-
large
macroscopic
large enough to be observed by the naked eye
mal-
maladjusted
badly adjusted
micro-
small
microscopic
so small that one needs a microscope to observe
multi-
many
multimillionaire
one having two or more million dollars
neo-
new
neolithic
new stone age
non-
not
nonconformist
one who does not conform
pan-
all
pantheon
a temple dedicated to all gods
poly-
polygonal
having many sides
post-
after
postgraduate
after graduating
pre-
pro-
for
proponent
a supporter
proto-
first
prototype
first or original model
pseudo-
false
pseudonym
false name; esp., an author's pen-name
re-, red-
back again
rejuvenate
to make young
together
reconnect
to put together again
retro-
backward
retrospect
a looking back on things
semi-
half
semicircle
half a circle
sub-
submerge
to put under water
super-
above
superfine
extra fine
tele-
far
telescope
seeing or viewing afar
trans-
across
transalpine
across the Alps
uni- one
tetra- four
oct- eight
mono- one
quint- five
nov- nine
bi- two
pent- five
dec- ten
duo- two
sex- six
lat- side
di- two
hex- six
ped- foot
tri- three
sept- seven
pod- foot
quad- four
hept- seven
aqua (water)
aquarium
hydro (water)
hydroplane
hemi (half)
hemisphere
semi (half)
equi (equal)
equivalent
tele (far off)
micro (small)
microfilm
onomy (science of)
astronomy
ology (study of)
uni (one)
universe
bi (two)
bicycle
tri (three)
triangle
octa (eight)
octagon
dec (ten)
decade
centi (hundred)
centimeter
milli (thousand)
millimeter
bio (life)
astro (star)
thermo (heat)
thermodynamic
meter (measure)
diameter
ped (foot)
pedestrian
pod (foot)
tripod
Prefixes that mean "no": a- de- dis-, in- non- un-, contra
Examples: disqualify, nondescript, unscrupulous, contradict, inadvertent
a-, an-
without, not
asexual, atypical, amoral, anarchy
reverse action, away
defrost, demystify, desensitize, deduct
dis-, dif-, di-
not, apart
dissatisfied, disorganized, different, divert
in-, il-, it-, im-
inappropriate, invisible, illegal, impossible
nonproductive, nonessential, nonsense
un-
unlikely, unnoticeable, unreliable
contra-, counter-
contrary, contradict, counterproductive
Prefixes that indicate "when," "where," or "more": pre-, post-, ante-, inter-, infra-, traps-, sub-, circum-, ultra
Examples: premature, postscript, anteroom, intervene, transformation
pre-, pro-
pre-dinner, preliminary, previous, prologue
postwar, postoperative, postpone
antecedent, antechamber
between, among
interstate, intercept, interfere
intramural, intrastate, intravenous
transcontinental, transparent, transaction
submarine, submerge, subjugate
circumnavigate, circumference
ultra-
beyond, on the far side of, excessive
ultrasonic, ultraviolet, ultraconservative