-u3 [u]
Discourse marker. WH question marker
../mp3s/u-dot/u3-dl-hb-03.mp3 Goodu dzidzabn da ludaba suunt? What did you do all summer?
Naayu di waan? What is your name?
Gooyu di pteeg̱n? What is your clan?

Related entries: Cross Ref: -du  question marker | gooyu  what is | naayu  who | ndaayu  where?/when?/how?

Source: Dictionary entry.