1. Etymology [et-uh-mol-uh-jee] noun, plural et·y·mol·o·gies.
1. the derivation of a word. Synonyms: word origin, word source, derivation, origin.
2. a chronological account of the birth and development of a particular word or element of a word, often delineating its spread from one language to another and its evolving changes in form and meaning. Synonyms: word history, word lore, historical development.
3. the study of historical linguistic change, especially as manifested in individual words.

2. Definition: Both Example: Amphibian

3. Definition: Against Example: Antibiotic

4. Definition: Skin Example: Dermatology, Dermatitis

5. Definition: To cut Example: Appendectomy

6. Definition: Plant Example: Phytoplankton

7. Definition: Disease Example: Pathology

8. Definition: Egg Example: Oogenesis

9. Definition: Inflammation Example: Arthritis

10. Definition: First Example: Prototype, Protozoa

11. Definition: To feed Example: Autotroph, Herbivore
-troph or -vor
Definition: To feed Example: Autotroph, Herbivore

12. Definition: Foot or Feet Example: Podiatrist, Quadruped
-ped or -pod
Definition: Foot or Feet Example: Podiatrist, Quadruped

13. Definition: Study of Example: Biology, Dermatology

14. Definition: To Kill Example: Pesticide, Homicide

15. Definition: Remain the same Example: Homeostasis

16. Definition: Light Example: Photosynthesis

17. Definition: Joint Example: Arthritis
Arthro-
Definition: Joint Example: Arthritis

18. Definition: One Example: Monohybrid

19. Definition: Small Example: Microscope

20. Definition: Large Example: Macromolecule

21. Definition: Below or Insufficient Example: Hypotonic, Hypodermic

22. Definition: Above or Excessive Example: Hyperactive, Hypertonic

23. Definition: Same Example: Homozygous
Homo- or Homeo-
Definition: Same Example: Homozygous

24. Definition: Different Example: Heterozygous

25. Definition: Removal of or To break down Example: Decompose

26. Definition: Green Example: Chlorophyll

27. Definition: Flesh or Meat Example: Carnivore

28. Definition: Life Example: Biology, Biodiesel

29. Definition: Two Example: Biped, Dissect
Bi- or Di-
Definition: Two Example: Biped, Dissect

30. Definition: Self Example: Autotroph, Automobile

31. Definition: Ancient Example: Archeology