A term of endearment or respect used to address someone in a letter or conversation.

प्रिय

English Usage: "Dear Sir, I am writing to inquire about your services."

Hindi Usage: "प्रिय सर, मैं आपकी सेवाओं के बारे में पूछताछ करने लिख रहा हूँ।"

Loved or valued.

प्यारा

English Usage: "He is a dear friend of mine."

Hindi Usage: "वह मेरा प्यारा दोस्त है।"