민원이 · 민원을
civil complaint, petition or request to a government office
Example
주민들이 소음 문제로 구청에 민원을 넣었어요.
Residents filed a complaint with the district office about the noise.
Word parts
민 people+원 request
Literally 'the people's request'.
Good to know
민원을 넣다 or 민원을 제기하다 'to file a complaint'; the person filing it is a 민원인.