prefix cata
down
catastrophe
disaster
cataract
waterfall
catapult
hurl (throw down)
prefix circum
around
circumnavigate
sail around
circumspect
cautious (looking around)
circumscribe
place a circle around
prefix com (by assimilation co, col, con, cor)
with, together
combine
merge with
commerce
trade with
communicate
correspond with
coeditor
joint editor
collateral
subordinate, connected
conference
meeting
corroborate
confirm
prefix contra, contro
against
contravene
conflict with
controversy
dispute (turning against)
prefix de
down, away
debase
lower in value
decadence
deterioration
decant
pour off
prefix dia
across