Several factors contribute to the mystery:
Moving on to the next sentence: "The website’s name, “Aparichit,” is derived from the Sanskrit word for “unknown” or “unfamiliar,” which fittingly reflects the enigmatic nature of the site."
"knowledge repository" → knowledge depository, "could be" → may function as, "vast repository of information" → similar to earlier, maybe vast and collection, "hosting" → hosting, "wide range of topics" → broad spectrum of content, "from science and technology to art and entertainment" → spanning scientific and tech domains to creative fields.