Why there are silent words in English?

Related questions

1. Where are the gnats in my house coming from?
2. Do dogs bark before they die?
3. Why is t silent in tsunami?
4. What do gnats symbolize?
5. What causes a gnat infestation?
6. Where do gnats come from?
7. What causes gnats in the house?
8. Is the G in GNU silent?
9. Do dogs know they are going to die?
10. Is T silent in mortgage?

Tags

1. #changes
2. #being
3. #diacritic
4. #silent
5. #change
6. #words
7. #english
8. #compare
9. #letters
10. #syllable
11. #often
12. #vowel
13. #pronunciation
14. #means
15. #pronounced
16. #another
17. #rather
18. #actually
19. #lengthening