According to Paul Theroux in his book Riding
the Iron Rooster, what city's name means red
hero in Mongolian?
Etymology, Etymology, and more Etymology
as well as grammar, usage, euphemism, slang, jargon, semantics, linguistics, neologism, idiom, cant, and argot.

The critically-acclaimed board game
MooT
consists of tough questions about the nuances of the English language.
Answer:
Ulan Bator
The place now known as
Ulan Bator was founded in 1649 as a monastery
town named Urga. When it became the capital of
the Mongolian republic in 1924, it was renamed Ulaanbaatar ("red hero") in honour of Sukhbaatar, who
liberated Mongolia from Chinese rule by calling in the Soviet Army.
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