Notas:

• Etnográfica:
  Possibly a variety of 'thunder stone', which includes stone axe heads, and other round stone objects believe to fall from the thundering sky.
  Re thunderstones: old people used to boil one in water and drink that water as a cure for fluttering hearts.
  Used with grinding stone (rubbing rock) 'ngalingkat'.
• Gramatical:
  Expression with two class markers: 'kat' for long objects and 'uup' for roundish ones.