For someone (actor -um-) to carefully question someone (loc ref -an) to get at the truth of a particular matter.
The questioner often uses carefully chosen phrases or devious means and avoids accusations; sometimes he attempts to lead or gently trick the respondent into a confession.
Hinangpahangpāan Dulnugwan hi Magga' ya la'tot ya imbāagna an hiyay nangākaw.
Dulnugwan continued to carefully question Magga' and finally he confessed that he was the one who had stolen (it).