Answer:
Prefixes un-, out-, dis-
Unfairness
Unsuccessful
Unselfishness
unhappiness
disgraceful
discouragement
disappointment
outsider
unevenly
outlandish
disagreeable
displeasure
Prefixes en-,de-
enabler
delightful
enforcement
designer
enclosure
departure
Suffixes -ful,-ly,-er,-ment
Unsuccessful
enabler
disgraceful
discouragement
delightful
repayment
disappointment
outsider
enforcement
unevenly
designer
bewilderment
