This is the 13145th most frequent Russian word.
меняют
"Меняют" means "they change" or "they exchange" in English.
Here, 'меняют' is used to describe the action of exchanging or swapping one thing for another.
Люди меняют старую мебель на новую.
People exchange old furniture for new.
In this sentence, 'меняют' denotes a recurring sequential change or replacement.
Сезоны меняют друг друга круглый год.
Seasons change each other throughout the year.
The verb 'меняют' here is applied to describe the act of substituting or replacing components.