From a book on Avar (Nakh-Daghestanian):
"iya - a polysemous interjection, expressing incomprehension, astonishment, surprise, disagreement with the other's opinion."

I am pretty sure I heard this word in Pakistan and remember being irritated by its ambiguity. Is this a shared Persosphere thing?

The book was finally published by John Benjamins after 3 years, though still with some really annoying errors introduced by them (see pictures for one example)

Always glad to sign away my copyright for 3 years of waiting and then a shit product, which also has restricted access.