1 to seal

2 to close

3 to confine

4 to seal off

5 to close down

6 sealed

7 confined

8 closed

9 unreceptive

1 to unlock

2 to release

1 to interlock

2 to be linked

3 chain (store etc)

1 to lock up

2 to lock

3 lock

4 classifier: 把 bǎ

1 to lock (a door)

2 to close with a latch

3 to lock into place

4 a lock

5 a latch

6 to lock a computer file (to prevent it being overwritten)

7 to lock (denying access to a computer system or device or files, e.g. by password-protection)

8 to focus attention on

9 to target

1 One key opens one lock.

2 There is a different solution for each problem. (idiom)

1 to be refused entrance (idiom)

2 to find the door closed

1 lit. fettered by fame and locked up by riches (idiom); tied down by reputation and wealth

2 the victim of one's own success

1 lit. doors not locked at night (idiom); fig. stable society

1 to have nothing further to do with a matter (idiom)