彼此 (bǐ cǐ): each other, one another

After that argument, they began to learn to respect each other's ideas, and their relationship became even better than before.

These twins look so alike that even their parents sometimes mistake one for the other.

In teamwork, members should support each other instead of only caring about their own interests.

Although they live in different places, they call each other every day to catch up on how the other is doing.

True friends won't drift apart because of distance; instead, they will cherish each other's friendship.