| Word root/ prefix | Root Meaning | Words based on the Root |
| Mater, matr/i | mother | Maternal - relating to motherhood Maternity - the state of being a mother Matriarch - a woman head of a household. |
| Max | greatest | Maximal - the best or greatest possible Maximize - to make as great as possible Maximum - the greatest amount. |
| Mega | great, large, million | Megalopolis - an area with many nearby cities Megaphone - a device that projects a loud voice Megastructure - huge building or other structure. |
| Meta | change, after, beyond, between | Metaphysics - study of nature and reality Metamorphosis - a complete change of form Metastasis - the transmission of disease to other parts of the body. |
| Micro | very small, short, minute | Microbe - a very small living thing Microchip - a tiny wafer with an integrated circuit Microscope - a device to see very small things. |