|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.