1. letter
2. mail
3. to trust
4. to believe
5. to profess faith in
6. truthful
7. confidence
8. trust
9. at will
10. at random

classifier: 封

1. to take care (of)
2. to control
3. to manage
4. to be in charge of
5. to look after
6. to run
7. to care about
8. tube
9. pipe
10. woodwind
11. classifier for tube-shaped objects
12. particle similar to 把 bǎ in 管...叫 constructions
13. writing brush
14. (coll.) to
15. towards