1 to connect

2 to relate to

3 to tie up

4 to bind

5 to be (literary)

1 to reflect on

2 to ponder over

1 to beat

2 to hit

3 variant: 考 kǎo

4 to inspect

5 to test

6 to take an exam

1 series

2 set

1 system

2 classifier: 个 gè

1 well tested (idiom); seasoned

2 veteran

1 lit. whoever hung the bell on the tiger's neck must untie it (idiom)

2 fig. whoever started the trouble should end it