This is the 14409th most frequent Korean word.
무엇이냐고
"무엇이냐고" means "asking what something is."
'무엇이냐고' is used to quote a question about 'what it is' in reported speech.
그는 내게 무엇이냐고 물었다.
He asked me what it was.
'무엇이냐고' here indicates the content of the students' curiosity, referring to 'what that object is'.
학생들은 교실에서 그 물체가 무엇이냐고 궁금해했다.
The students wondered in the classroom what that object was.
The term '무엇이냐고' represents the essence of inquiry in a reflective context about the meaning of luck.