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

1.
el uno al otro, mutuamente
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.
Se quieren mucho el uno al otro.
•
We help each other with our homework.
Nos ayudamos mutuamente con la tarea.