A source that provides a large amount of valuable information
जानकारी का भंडार
English Usage: She is a mine of information when it comes to ancient history.
Hindi Usage: वह प्राचीन इतिहास के बारे में जानकारी का खजाना है।
jaanakaari ka khazaana, jankari ka khajana, jankari ka khazaanah, jaanakari ka khajanaa, jaanakari ka khazana