1 not to be concerned

2 regardless of

3 no matter

1 to hand over

2 to deliver

3 to pay (money)

4 to turn over

5 to make friends

6 to intersect (lines)

7 variant: 跤 jiāo

1 to make friends

1 to exchange

2 exchange

3 communication

4 interaction

5 to have social contact (with sb)

1 to be connected

2 traffic

3 transportation

4 communications

5 liaison

1 lit. one hand exchanges the cash, the other the goods (idiom)

2 fig. to pay for what you want in cash

3 simple and direct transaction

1 lit. doesn't (even) enter a single aperture (of one's head)

2 I don't understand a word (idiom)

3 it's all Greek to me

1 grasp this fundamental point and all the rest will follow (idiom)

1 to be impervious to reason (idiom)

2 unreasonable

1 not understanding things (idiom); devoid of sense