Medical Terminology Building Blocks: Roots, Prefixes, and Suffixes

Medical terms are constructed from roots, prefixes, and suffixes (mostly Greek/Latin). Mastering these allows deciphering thousands of terms.

Common Roots (Core Meaning)

Root	Meaning	Example
cardi/o	heart	cardiology, cardiomyopathy
derm/a, dermat/o	skin	dermatitis, epidermis
gastr/o	stomach	gastritis, gastrectomy
hepat/o	liver	hepatitis, hepatomegaly
neur/o	nerve	neurology, neuralgia
oste/o	bone	osteoporosis, osteoblast
pulmon/o	lung	pulmonary, pneumonia
ren/o, nephr/o	kidney	renal, nephrolithiasis

Common Prefixes (Modify Root)

Prefix	Meaning	Example
a-, an-	without, absence	anemia, anoxia
hyper-	excessive, above	hypertension, hyperglycemia
hypo-	deficient, below	hypotension, hypoglycemia
inter-	between	intercostal, interstitial
intra-	within	intravenous, intramuscular
sub-	under, below	subcutaneous, sublingual
poly-	many	polyuria, polyneuropathy
brady-	slow	bradycardia, bradypnea
tachy-	fast	tachycardia, tachypnea

Common Suffixes (Function/Condition)

Suffix	Meaning	Example
-itis	inflammation	arthritis, appendicitis
-ectomy	surgical removal	appendectomy, cholecystectomy
-tomy	incision	laparotomy, tracheotomy
-ostomy	surgical opening	colostomy, tracheostomy
-plasty	surgical repair/reconstruction	rhinoplasty, angioplasty
-pexy	surgical fixation	gastropexy, nephropexy
-pathy	disease	neuropathy, cardiomyopathy
-emia	blood condition	anemia, hyperkalemia
-algia	pain	neuralgia, myalgia
-lysis	destruction/breakdown	hemolysis, thrombosis
-scope / -scopy	instrument to view / viewing	endoscope, colonoscopy
-gram / -graphy	record / process of recording	electrocardiogram, mammography

Combining Vowels

Usually o (or i) links root to suffix or root to root: gastr/o/enter/o/logy. Dropped before vowel-initial suffix: gastr/itis.

Systematic learning of these components builds fluency in medical language.