(1) arch- means chief; first Examples Archetype = original Archbishop = chief bishop Archeology = study of first people or ancient times
(2) be- means over; thoroughly Examples Bedaub = smear all over Befuddle = to confuse totally Beguile = totally charm or even deceive
(3) bi- means two Bicycle = two-wheeled fun Biennial = every two years Examples Bicycle = two-wheeled fun Biennial = every two years Bicameral = two groups/houses (like in congress)
(4) cata- means down Catastrophe = disaster Cataract = waterfall Examples Catastrophe = disaster Cataract = waterfall Catapult = to hurl (throw down)
(5) circum- means around Examples Circumnavigate = travel all the way around the world Circumspect = cautious (looking around) Circumscribe = to limit (place a circle around)
(6) com-/con- means with; together Examples Combine = put together with Communicate = talk with Conference = meeting
(7) co-/col- means with; together Examples Coeditor = editor with another Collateral = connected with Collate = to put together
(8) Cor- means with; together Examples Correlate = to match up with Corroborate = to confirm; to verify
(9) Contra-/contro- means against Examples Contravene = conflict with Controversy = argument or dispute Contradictory = disagreeing with
(10) Demi- means partly; half Examples Demigod = partly a god Demitasse = small cup
(11) Di- means two Dichotomy = split into two parts Examples Dichotomy = split into two parts Dilemma = choice between two bad alternatives
(12) Dia- means across Examples Diameter = distance across the center of a circle Diagonal = distance across a figure Diagram = a drawn model
(13) Dis-/dif- means not; apart Examples Discord = not in harmony Differ = to disagree Disparity = not being equal; having a difference
(14) Dys- means faulty; bad Examples Dysfunctional = operate incorrectly Dyslexia = faulty ability to read Dyspepsia = indigestion
(15) Ex-/e- means out Exit = to leave Expel = to drive out Examples Exit = to leave Expel = to drive out Extirpate = to root out Eject = to throw out
(16) Extra-/extro- means beyond;outside Examples Extracurricular = beyond the curriculum Extraterritorial = beyond a nation’s boundaries Extrovert = a person mostly interested in other people and things
(17) Hyper- means above; excessively Examples Hyperbole = exaggeration Hyperventilate = breathe very quickly
(18) Hypo- means beneath; lower Examples Hypoglycemia = low blood sugar Hypothyroid = low-functioning Hypodermic = beneath your skin
(19) in-/im- means not Inefficient = not efficient or productive Examples Inefficient = not efficient or productive Inarticulate = can’t speak understandably Impeccable = not wrecked up; perfect
(20) il-/ir- means not Illegible = not readable Examples Illegible = not readable Irrelevant = doesn’t matter Irrevocable = can’t change it or “call it back”