PREFIX
com- with, together
de- away, down
ex- out, away, from
im- in, into, not
op- against

ROOT
pos/posit - place, put

SUFFIX
-ion - state, quality, act

WORDS AND DEFINITIONS
expose - to place something where it can be seen; to put in an unprotected situation
composition - an arrangement or putting together of parts
deposit - to put down or in a safe place
imposition - an excessive or unjust burden placed on someone
opposition - the act of resistance or action against