서민이 · 서민을
ordinary people, common folk, working class
Example
정부는 서민을 위한 주택 정책을 발표했습니다.
The government announced a housing policy for ordinary people.
Word parts
서 common+민 people
Literally 'the common people', as opposed to the elite.
Good to know
Often used warmly: 서민 음식 means cheap everyday food like 떡볶이 or 순대.