pro-sumti whose referent's identity is unknown to the speaker
Short for "lo poi'i mi na djuno lo du'u ma kau me ke'a"; e.g. "nau'o jai daspo lo staku" (someone broke the ceramic and I don't know who), "ra zvati nau'o" (I don't know where she is), "ka'e jinga ta'i nau'o" (it's possible to win somehow, but I don't know how).