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 read
2. to study (a subject)
3. to attend (a school)
4. to read aloud
5. to miss (sb)
6. idea
7. remembrance
8. twenty (banker's anti-fraud numeral corresponding to 廿 niàn)

classifier: 頓