뒷조사 [-調査] a detailed[secret] investigation[inquiry]. ~하다 investigate secretly[in secret]; make secret[confidential] inquiries into .
조사: 조사 [弔詞·弔辭] [죽음의 슬픔을 나타낸 글] words[a letter] of condolence; (장례식에서의) a memorial[funeral] address. ~를 하다 express one's condolence / [연설을 하다] make a memorial address.조사 [早死] a premature[an untimely / an