jatasēña is the word for warning. Here it is the object of setesse, which is se with a 3rd person paucal (or collective) source and a 3rd person plural beneficiary, so something like ‘they warn them’, with they being a cohesive group and them being multiple people. And ien, of course, renames the object of se.
setesse jatasēña ien sasēsse jasēsi jasēñi;
[se.tes.sÄ• ja.ta.zeË.É²É™Ì† jÉ›n sa.zeË‘s.sÄ• ja.zeË.zi ja.zeË.É²i]
They warn them that their kidneys’ spots are dangerous.