1. Root Word Fic/Fect
to make

2. An enlargement of sound.
Amplification:
An enlargement of sound.
The amplification of the guitar solo hurt my ears.

3. Affect to influence; to make an impression on.
I would have never guessed that my friend’s actions would affect me so much.

4. Effect
result; v. to cause or bring about a result (to "effect a change")
When I began to study more for my English class, it had a dramatic effect on my grade.

5. producing the wanted results; successful
Efficacious:
producing the wanted results; successful
To have an efficacious semester you must do all your work.