| Word root/ prefix | Root Meaning | Words based on the Root |
| Cumul | mass, heap | Accumulate - To gather or pile up Cumulative - Gradually building up |
| Dec/a | ten | Decade - 10 years Decathlon - Athletic contest that includes 10 disciplines in which each participant competes December - formerly the 10th month of the Roman calendar |
| Derm/a | skin | Dermatologist - A doctor for the skin Pachyderm - A class of animals with very thick skin (elephant, rhinoceros) Dermatitis - Inflammation of the skin |
| Em, en | into, cover with, cause | Empathy - Intention to feel like another person Empower - Put into power Engorge - Make larger. |
| Fac/t | make, do | Artifact - An object made by a person Factory - A place where things are made Malefact - A person who does wrong. |
