each other
🇺🇸
/ˌiːtʃ ˈʌðər/
🇬🇧
/ˌiːtʃ ˈʌðə(r)/
used when two or more people or things do the same thing to one another
The two friends helped each other with their homework.
두 친구는 서로의 숙제를 도와주었습니다.