**Here are 10 examples of using the word «lock» in English:**
1. I forgot to lock the front door when I left the house, so I had to go back and do it.
2. The bike lock on my bike was broken, so I had to buy a new one.
3. She locked the door with a key and then put on an extra security lock.
4. The lock on the safe was very old and rusty, so it was difficult to open.
5. We had to use a master key to unlock the lock on the storage room.
6. The lock on my suitcase was too weak, and it opened easily.
7. He tried to pick the lock on the car door, but it didn't work.
8. The lock on the gate was so tight that it was impossible to open it without a key.
9. She put a password lock on her phone to protect her personal information.
10. The lock on the shed was broken, and the door was left open.