This is the 9202nd most frequent Spanish word.
abrochan
"Abrochan" means "they fasten" or "they button."
In this sentence, 'abrochan' refers to the act of fastening seatbelts, indicating a physical action applied to an object.
Los pasajeros abrochan sus cinturones antes del despegue.
The passengers fasten their seatbelts before takeoff.
Here, 'abrochan' is used reflexively (the verb 'abrocharse') to describe the children fastening their own jackets, showing personal action.
Los niños se abrochan las chaquetas porque hace frío.
The children fasten their jackets because it is cold.
In this case, 'abrochan' is part of a relative clause describing shirts that are designed to be fastened in the front, indicating a characteristic of the object.