finish

If something finishes, it stops and doesn't start again; it comes to the end.

Example: I finish work at 4:30 and I get home at 5:00.

If something finishes somebody off, it uses all their energy or it kills them.

Example: That last run around the track completely finished me off.

If you finish something up, you use the last of it.

Example: I finished up the milk this morning. There's none left.

If you are finished with something, you don't need it anymore.

If you finish the surface of something, especially wood, you make it smooth and ready to use.