추궁해요 · 추궁했어요 · 추궁할 거예요 · 추궁하세요
to question closely, to grill, to press (for an explanation or accountability)
Example
경찰은 용의자에게 그날 밤의 행적을 추궁했습니다.
The police grilled the suspect about his whereabouts that night.
Word parts
추 chase+궁 to the end
Literally 'chase to the end' — pressing until the truth comes out.