ki'u BAI cmavo

krinu modal, 1st place (justified by) justifiably; because of reason ...

On affix form:

x1 (event/state) is a reason/justification/explanation for/causing/permitting x2 (event/state).

In notes:

ja'onai (comp!)
discursive/evidential: after all...
ki'au (exp!)
evidential: I reason - I think impulsively.
ko'au (exp!)
kosmu modal, 1st place with purpose...
lu'ei (exp!)
convert a grammatical quotation to a tanru unit; x1 expresses/says the quoted text for audience x2 via expressive medium x3.