Ответ:

+ ment

Disappointed (disappointment)

embarrassed (embarrassment)

excited (excitement)

+ness

Lonely (loneliness)

friendly (friendliness)

happy (happiness)

nervous (nervousness)

sad (sadness)

selfish (selfishness)

+ion

depressed (depression)

confused (confusion)

exhausted (exhaustion)

Объяснение: