The Vietnamese word "bạn cũ" translates to "old friend" in English. It is a noun used to refer to a friend that you have known for a long time, often from childhood or previous stages of life. This term carries a sense of nostalgia and a deeper connection, as it implies shared memories and experiences.
You can use "bạn cũ" when talking about someone you have been friends with for many years. It can be used in conversation or writing when reminiscing about past friendships or when reconnecting with someone from your past.
In more advanced contexts, "bạn cũ" can also imply a sense of loyalty and trust that has developed over time. You might use it in discussions about maintaining long-term friendships or the importance of having friends from different stages of your life.
"Bạn cũ" specifically emphasizes the duration and history of the friendship. It is different from just saying "bạn" (friend) because "bạn cũ" implies a long-standing relationship rather than a new or casual friendship.