-astr- , -aster- , -astro-

astral, asteroid, astronaut

-auto-

autograph

-bas-

basement, base, basal

-bio-

biography

-cap-, -capt-, -cept-, -cip-

capitulate, captive, concept, recipient

-cede-, -ceed-, -ceas-, -cess-

precede, proceed, decrease, cessation

-chron- , -chrono-

chronic, chronological

-cosm- , -cosmo-

microcosm, cosmopolitan

-cred-

credible, incredible, credit,  

-cryph- , -crypt-

apocryphal, cryptographer

dem-, demo-

epidemic, democracy

dia-

diameter

-dic-, -dict-

dictionary, prediction, indicate, diction

dog-, -dox

dogmatic, orthodox

-duc-, -duct-, -duit-

educate, conduct, conduit

-fac-, -fact-, -fect-, -fic-, -fy-

faculty, artifact, defect, beneficial, clarify

gen-

generation

-gnos-

diagnostic

-graph-, -graphy, -gram

graphite, autobiography, telegram

-ject-

eject, project, object

-log-, -logue

logic, dialogue

-lys-

analysis

-metr-, -meter

metric, kilometer

micro-

microchip

-mis-, -miss-, -mit-, -mitt

promise, missile, transmit, intermittent

-morph-

amorphoushh, metamorphosis, morphology

naut-

nautical

-note- , -not-

denote, notion

-pel- , -puls-

expel, compulsive

-pend- , -pens-

pendulum, pension

phon-, -phone

phonics, telephone

pol-, polis-

police, metropolis

-pon- , -pos-

component, position

-port-

portable

-rupt-

bankrupt

-tele-

television, telescope

-therm-

thermostat, thermometer, thermal, thermosphere

-the-

parentheses, atheist

-mort-

mortician, mortal, immortal

-scop-, -scope-

microscope, telescope

watch, look at

-spec- , -spic-

spectator, conspicuous

-scrib- , -scribe- , -script-

scribble, describe, inscription

-ten-

often, retentive, tenacious

-tain- , -ten- , -tin-

contain, tenure, retinue

-tac- , -tag-, -tang- , -teg-

contact, contagious, tangible, integral

-temp-

tempo, temporary

-vers- , -vert-

reverse, invert

-ver-

verify, verdict, veracity

-voc- , -vok-

vocal, invoke, advocate, equivocate

-ven- , -vent-

intervene, convention