1 letter

2 mail

3 classifier: 封 fēng

4 to trust

5 to believe

6 to profess faith in

7 truthful

8 confidence

9 trust

10 at will

11 at random

1 information

2 news

3 message

1 to be convinced (that sth is true)

2 to believe

3 to accept sth as true

1 text message

2 SMS

1 conservative

2 to guard

3 to keep

1 to speak without thinking (idiom)

2 to blurt sth out

1 to be trusted both at home and abroad (idiom)

1 brimming with confidence (idiom)

1 (idiom) to continue in the same old rut

2 diehard conservative attitudes

1 hidebound by convention (idiom)