Tianzhu
Tianzhu (天竺) Chinese name for ancient India, translates roughly to "heaven center(of)" (i.e. spiritual center); used especially during the Tang dynasty in reference to the Indian origins of Buddhism.
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Tenjiku (天竺) is the Japanese word, which derives from Chinese word Tianzhu(天竺) commonly used in reference to pre-modern India. Tian, the root word for the Japanese kanji, means "heaven", while, jiku, means: "the center of", or 'primary concentration of'. The foreign loanwords Indo (インド) and India (インディア) are also used in some cases.
The current Chinese word for India is Yindu (印度). Similar to Hindu and Sindhu, the term yin was used in classical Chinese much like the English Ind. The monk Xuanzang referred to India as Wu Yin or "Five Inds". The current Japanese name for modern India is the foreign loanword Indo (インド).
Read more about this topic: Names Of India