each other
US /iːtʃ ˈʌð.ər/
UK /iːtʃ ˈʌð.ər/

1.
서로, 각자
used to show that each of two or more people or things does something to the other or others
:
•
They love each other very much.
그들은 서로를 매우 사랑한다.
•
We help each other with our homework.
우리는 숙제를 서로 돕는다.