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 psychology

2 mentality

1 to comprehend

2 to understand

3 comprehension

4 understanding

1 to be convinced (that sth is true)

2 to believe

3 to accept sth as true

1 to be impervious to reason (idiom)

2 unreasonable

1 not understanding things (idiom); devoid of sense

1 to completely ignore (idiom)

2 to pay no attention to

3 not to be in the least concerned about

1 to speak without thinking (idiom)

2 to blurt sth out

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