PREFIX
de - away, down
ex - out, away, from
re - back, again

ROOT
cogn/cogni - know
termin - end, limit

SUFFIX
-al - like,related to
-ate - to make, to act
-ation - an action or process
-ize - to make, to act
-tion - state, quality, act

WORDS AND DEFINITIONS
cognition - process of acquiring knowledge
recognize - to identify someone or something seen before
determination - an intent to reach a goal
exterminate - to destroy or get rid of completely
terminal - related to something leading to the end or to death