The word " caravanserai" is a combination of the Persian words " karvan" , which means a group of travellers or a caravan, and " saray" , a palace or enclosed building.
He was doing research there at the time and studying the Farsi language, but Iran sentenced him to 10 years in prison saying his school, Princeton University, had sent Wang to Iran to get secret information about the country.
He learned that I was studying Persian, and I said the grammar was star tlingly simple, because its use as a lingua franca over several centuries had shorn it of many of its complexities.
This can explain why pairs of closely related languages-Tajik and Persian, Icelandic and Swedish, Frisian and English-differ in grammatical complexity.