pau _UI3a cmavo

discursive: optional question premarker.

See also preti.

On affix form:

pagbu: x₁ is a part/component/piece/portion/segment of x₂ [where x₂ is a whole/mass]; x₂ is partly x₁.

In notes:

pau'i (exp!): discursive: marks the previous construction as a question, with valid responses being any construction which could replace it without changing the grammar of the overall utterance.
pi'au (exp!): digit/number: pi (approximately 3.1416...); the constant defined by the ratio of the circumference to the diameter of all circles.
uei (exp!): discursive: optional answer premarker