A person who has a long experience in a particular field, especially one involving hardship.

A friend who has been known for a long time.

पुराना दोस्त

English Usage: It's great to meet again after so many years; you are truly an old friend.

Hindi Usage: इतने सालों बाद फिर से मिलना अद्भुत है; आप वास्तव में एक पुराना दोस्त हैं।