This is the 10073rd most frequent Korean word.
공항은
"공항은" means "The airport is" or "As for the airport" in English.
The subject of the sentence, indicating the specific topic being discussed is 'the airport'.
공항은 매우 크고 바쁘다.
The airport is very large and busy.
Indicates that the topic or subject is the airport in relation to its importance to travelers.
공항은 여행객들에게 중요하다.
The airport is important to travelers.
Refers to the airport as the subject being affected by the action of renovation.