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 associate (with)

2 to have contact (with)

3 to hang out (with)

4 to date

5 (interpersonal) relationship

6 association

7 contact

1 (business) transaction

2 business deal

3 classifier: 笔 bǐ

1 to exchange

2 exchange

3 communication

4 interaction

5 to have social contact (with sb)

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 act in collusion (idiom)

1 mutual exchange of assistance (idiom)

2 to benefit from each other's strengths and make up each other's shortfalls

3 to reciprocate with material assistance

4 scratch each other's back