รากศัพท์ในภาษาอังกฤษ » ภาษาอังกฤษดอทคอม "อยู่เมืองไทยก็เก่งภาษาอังกฤษได้"

รากศัพท์ [Root Words] คือคำที่มีความหมายในตัวมันเอง เมื่อนำไปเป็นส่วนประกอบในการสร้างคำศัพท์ใหม่ทำให้เราสามารถทราบถึงความหมายของคำศัพท์ใหม่ได้ง่ายขึ้น

ROOT	MEANING	EXAMPLE WORDS
Ambi	Both	Ambidextrous – Use both hands well Ambiguity – Double meaning, can be interpreted in more than one way
Aqua	Water	Aquarium – Artificial environment for water plants and animals Aquatic – Plant or animal living in water
Art	Skill	Artistic – Natural skill in art Artisan – Skilled manual work
Auto	Self	Automatic – Working by itself Autonomous – Having self-government
Bi	Two, Twice	Biannual – Occurring twice in a year Bigamy – Being married twice
Bio	Life	Biology – Study of living things Biohazard – Risk to living things
Cardio	Heart	Cardiology – Branch of medicine dealing with the heart Cardiovascular – Pertaining to the heart and blood vessels
Cent	Hundred	Centenary – Hundredth Anniversary Centenarian – Person who is hundred or more years old
Cert	Sure	Certificate – Document attesting a fact like birth, death, graduation, marriage etc Certitude – Feeling of certainty
Chrono	Time	Chronology – Study of events in the order of their occurrence Chronograph – Instrument that records time with high accuracy
Counter	Contrary	Counter-intuitive – Contrary to intuition Counter-productive – Having the opposite effect as intended
De	Remove	Detoxify – Remove the poisonous substances Dethrone – Remove from the throne
Dem	People	Democracy – System of government elected by the people Demography – Statistics of births, deaths, mortality etc. of people
Derm	Skin	Dermatologist – Doctor specialized in the study of skin disorders Dermatitis – Inflammation of the skin
Flor	Flower	Florist – Person who sells flowers Floral – Decorated with flowers
Gastro	Stomach	Gastritis – Inflammation of the stomach lining Gastroenterologist – Doctor specialized in the study of stomach and intestinal disorders
Grat	Pleasing	Gratify – Delight or please someone Gratuity – Tip, token of appreciation
Hepa	Liver	Hepatitis – Inflammation of the liver Hepatic – Relating to the liver
Hept	Seven	Heptagon – Figure with seven sides Heptathlon – Athletic event having seven events
Hex	Six	Hexagon – Figure with six sides Hexavalent – Having a valency of six
Inter	Between	Interconnect – Connect with each other Interdepend – Depend on each other
Iso	Equal	Isosceles – Triangle having two equal sides Isobar – Line on map connecting points of equal barometer pressures
Jud	Law	Judiciary – Collective of judges Judgement – Decision of a court
Kilo	Thousand	Kilogram – Thousand grams Kilolitre – Thousand litres
Lacto	Milk	Lactic – Obtained from mil Lactose – Sugar occurring in milk
Mal	Bad	Malevolent – Wishing bad things on others Malice – Intention to do evil
Mort	Death	Mortuary – Place where dead bodies are kept until they are cremated or buried Mortician – Undertaker
Narr	Tell	Narrate – To tell a story Narrator – Person who tells a story.
Nov	New	Novelty – Newness or originality Novice – Beginner
Oct	Eight	Octagon – Figure with eight sides Octave – Stanza of eight lines
Ocu	Eye	Ocular – Connected with the eyes Oculist – Specialist in the medical treatment of eye disorders
Omni	All	Omnipresent – Present everywhere at the same time Omnivorous – Eating all kinds of foods
Ortho	Straight	Orthodontics – Dealing with straightening of teeth Orthopaedics – Dealing with the straightening of bones
Pan	All	Panorama – An all-around view Pandemic – Prevalent all over a country or world
Ped	Foot	Pedicure – Treatment of the feet Pedal – Foot operated lever
Poly	Many	Polygon – Figure with many sides Polygamy – Having more than one husband or wife at the same time
Psych	Mind	Psychiatry – Study of mental diseases Psych – Prepare oneself mentally for a task
Quad	Four	Quadruple – Increase four times Quadrangle – Figure having four sides
Quin	Five	Quintuple – Increase five times Quintuplet – Five children born at the same time
Semi	Half	Semi-circle – Half of a circle Semiaquatic – Animal living partly on land and partly in water
Sept	Seven	Septuplet – Seven children born at the same time Septuagenarian – People aged before 70 and 79
Trans	Across	Transpacific – Across the Pacific Ocean Transnational – Across national boundaries
Tri	Three	Triangle – Figure with three sides Triathlon – Athletic event having three events
Uni	One	Unitarian – People who believes God is one person Unique – One of a kind
Vince	Conquer	Invincible – One who cannot be conquered Convince – Persuade a person