If the son disobeys
his parents, he will be in trouble. (obey)
She unlocked the door and then opened it. (lock)
Mary's mother used to be religious, but now she unbelieves in God. (belief)
The board has so unconducted the affairs of the company that it is deep in
debt. (conduct)
The friends never dislike anyone that they are in competition with. (like)
Have you unloaded the parcels from the car? (load)
I think it's high time to defrost our refrigerator. (frost)
The driver misinterpreted the policeman's signal and turned in the wrong
direction. (interpretation)
They've disconnected our phone because we didn't pay the bill on time. (connection)
The political instability of the region has discouraged investments by big
companies. (courage)