**Here are some examples of using the word «fasten» in English:**
1. Make sure to fasten your seat belt before taking off.
2. I need to fasten this button on my shirt. It keeps coming undone.
3. The train doors will automatically fasten when the train starts moving.
4. She fastened the straps of her backpack and walked towards the exit.
5. The pilot instructed passengers to fasten their seat belts during turbulence.
6. The teacher reminded the students to fasten their lab coats before starting the experiment.
7. He fastened the last button on his jacket and looked at himself in the mirror.
8. The mechanic warned the driver to fasten all the loose items in the car before driving.
9. The captain fastened the life jackets for everyone on the boat.
10. She fastened her gaze on the stage, waiting for the performance to begin.