aqua

water

i.e. aquarium, aqueduct, aquamarine, aquatic

aud

hearing

i.e. audio, audition, audible

auto

self

i.e. autograph, autobiography, automobile, autonomy

astro

star

i.e. astronomy, astrophysics, astrology, astronaut, astronomer, asterisk

biblio

book

i.e. Bible, bibliography, bibliophile, biblioteca*

bio

life

i.e. biography, biology, bionic, biotic, antibiotic, biometrics

chron

time

i.e. synchronize, chronology, 

chronic, chronicle, anachronism

cide

to kill, a killer

i.e. homocide, suicide, genocide

corp

body

i.e. corpse, corporation, corps, incorporate, corporeal

cred

to believe

i.e. credit, credentials, 

credulous, credible

demo, dem

the people

i.e. democracy, demography, 

demogogue, endemic,

pandemic

dic, dict

speak, tell

i.e. dictate, dictation, diction, dictator, verdict, predict, edict

dorm

sleep

i.e. dormant, dormitory, 

dormer, dormir*

geo

earth

i.e. geology, geologist, 

geometry, geography, 

geopolitical

graph

to write, to draw

i.e. autograph, biography, photograph, telegraph

homo

same, alike

i.e. homonym, homogenize, 

homophone

hydro

water

i.e. hydroplane, dehydrate, 

hydroelectric, hydrogen

ject

throw

i.e. reject, deject, eject, project, inject

logos, logy

study

i.e. geology, astrology, biology, zoology, anthropology

luna

moon

i.e. lunar, lunacy, lunatic, interlunar

meter

measure

i.e. thermometer, diameter, gometry, barometer

micro

small

i.e. microscopic, microscope, 

microcosm

mega, macro

great, large

i.e. megaphone, megalith, 

macroclimate, macroevolution

min

small, little

i.e. minimal, minimize, 

minimum, mini, miniature, 

minute

mit, mis

send

i.e. mission, transmit, missile, submit, emit

path

feeling, suffering

i.e. pathetic, pathology, apathy sympathy, telpathy, empathy

ped

foot

i.e. pedestrian, pedal, peddler, pedicure, pedometer

philia

love, friendship

i.e. philosopher, Philadelphia, 

philanthropist

phobia

fear, intense dislike

i.e. claustrophobia, arachnophobia

phono

sound

i.e. phonograph, microphone, symphony, telephone, megaphone

photo

light

i.e. photosynthesis, telephoto, photograph, photosensitive

port

carry

i.e. transport, portable, report

psycho

mind, mental

i.e. psychology, psychic, 

psychotropic, psychotic

rupt

to break

i.e. rupture, disrupt, interrupt, corrupt

spect

see

i.e. respect, inspect, spectator, spectacles, prospect

scope

look at

i.e. microscope, telescope, periscope, kaleidoscope

script

to write

i.e.  manuscript, scripture, prescription, scribble

sol

sun

i.e. solar, solstice, solarium, parasol

struct

build, form

i.e. instruct, construct, destruct, infrastructure, instrument

therm

heat, warm

i.e. thermostat, thermal

tele

distant

i.e. telephone, television, 

telegraph, telescope, telepathy

terra

land

i.e. terrarium, extraterrestrial, terrain, tierra*

vert, vers

to turn

i.e. reverse, versatile, invert, convert

zoo

animal

i.e. zoology, zoogeography