Delhi

wiktionary

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From Hindi दिल्ली(dillī) / Urdu دلی‎ (dillī) and Hindi देहली(dehlī) / Urdu دہلی‎ (dehlī), of uncertain origin. See Delhi § Toponym at Wikipedia.

Mongolian Дэлхий(Delkhii) / ᠳᠡᠯᠡᠬᠡᠢ(delekei).

etymonline

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Delhi

city in India, of unknown origin, perhaps connected to Hindi dehli "threshold," with reference to the watershed boundary between the Ganges and Indus, which is nearby.