Medical English — E–G Word Formation Practice: Key Terms & Exercises

Medical English — Word Building: E to G (Prefixes, Roots, Suffixes)

Overview

Concise guide to common medical morphemes starting with letters E–G, showing prefixes, roots, and suffixes used to form clinical terms. Includes meanings, pronunciation tips, example words, and brief usage notes for accurate reading and writing.

Prefixes (E–G) — common examples

• ecto- / exo- — outside, external (e.g., ectopic, exogenous)
• endo- — within, inner (e.g., endoscope, endocrine)
• epi- — upon, above (e.g., epidermis, epigastric)
• eu- — good, normal (e.g., euphoria, euthyroid)
• extra- — outside of, beyond (e.g., extracellular)
• hemi- — half (e.g., hemiplegia)
• hetero- — different (e.g., heterozygous)
• homo-/homeo- — same, similar (e.g., homogeneous, homeostasis)
• hydro- — water (e.g., hydrocephalus)
• hyper- — excessive, above (e.g., hypertension)
• hypo- — deficient, below (e.g., hypoglycemia)

Roots (E–G) — common examples

• encephal- — brain (e.g., encephalitis)
• enter- — intestine (e.g., enteritis)
• erythro- — red (e.g., erythrocyte)
• gastr- / gastro- — stomach (e.g., gastritis, gastroenterology)
• glyc- / gluc- — sugar (e.g., glycogen, glucose)
• gloss- / lingu- — tongue (e.g., glossitis)
• geront- / geri- — old age (e.g., gerontology)
• gon- / gonad- — seed, reproductive organ (e.g., gonad, gonorrhea)

Suffixes (E–G) — common examples

• -emia — blood condition (e.g., anemia, hyperglycemia)
• -ectomy — surgical removal (e.g., gastrectomy)
• -emia — (listed above)
• -genic — produced by or in (e.g., carcinogenic)
• -gram / -graph — record/image or instrument (e.g., electrocardiogram, mammography)
• -iasis — pathological condition or infestation (e.g., lithiasis)
• -itis — inflammation (e.g., encephalitis, gastritis)
• -logy — study of (e.g., gastroenterology)
• -megaly — enlargement (e.g., splenomegaly)
• -oma — tumor, swelling (e.g., melanoma)
• -opsy — view of, examination (e.g., biopsy)
• -plasia / -plasm — formation, growth (e.g., hyperplasia, neoplasm)
• -plegia — paralysis (e.g., hemiplegia)
• -ptosis — drooping, prolapse (e.g., gastropotosis)
• -rrhea — discharge, flow (e.g., diarrhea)

Pronunciation & formation tips

• Combining vowels (usually “o”) connect roots to suffixes (e.g., gastr + o + logy → gastroenterology).
• When a prefix ends with a vowel and the root begins with a vowel, the vowel may be dropped or retained for euphony (e.g., endo + cardio → endocardio- vs. endocardial).
• Stress and syllable counts affect pronunciation—learn common stress patterns (e.g., me-TA-sta-sis).

Quick practice (3 examples)

1. gastro + enter + -itis → gastroenteritis (stomach + intestine inflammation)
2. hyper + glyc + -emia → hyperglycemia (excess sugar in blood)
3. hemi + plegia → hemiplegia (paralysis of one side)

Usage notes

• Many terms combine multiple roots/prefixes; parse them left-to-right for meaning.
• Some morphemes have overlapping meanings—context and collocations matter (e.g., gastr- vs. gastro-).
• Spelling matters: small changes (a vs o) can alter meaning or form.

If you want, I can:

• produce a printable cheat-sheet of E–G morphemes, or
• create 20 practice flashcards with definitions and example sentences. Which would you prefer?