Why is perfect tense called perfect?

Related questions

1. What is present perfect past perfect and future perfect?
2. What is present perfect aspect?
3. What is present perfect progressive tense?
4. Where do we use present perfect tense?
5. What is the present perfect tense examples?
6. What is present perfect tense in English?
7. What is difference between present perfect and present perfect continuous?
8. What is present perfect and present perfect continuous?
9. When use the present perfect tense?
10. What is the difference between present perfect and past perfect?

Tags

1. #because
2. #finished
3. #latin
4. #comes
5. #achieved
6. #called
7. #completed
8. #combines
9. #perfect
10. #perfectus
11. #grammatical
12. #present
13. #aspect
14. #tense