unload

To remove the load or cargo from (a vehicle, etc.).

to unload a ship

to unload a camel

To remove (the load or cargo) from a vehicle, etc.

to unload bales of hay from a truck

To deposit one's load or cargo.

Some stations have collection vehicles unload on the floor, using a front loader to push material into the hopper.

To give vent to or express; to unburden oneself of.

to unload on someone

[…] who bowled with such fury that he needed beer to give him something to sweat out, and who unloaded his emotions in words as hard as his bowling.

To remove (something previously loaded) from memory.

When you unload a DLL, the memory and other system resources it is using will become available for use by other applications.