This is the 9833rd most frequent Korean word.
곤충이
"Insect."
Here, '곤충이' is the subject (nominative case marker '이') of the sentence indicating who is performing the action.
곤충이 나무 위를 기어가고 있다.
The insect is crawling on the tree.
In this sentence, '곤충이' is the subject indicating the presence or quantity of insects, affecting the situation described.
곤충이 많아서 움직이기 힘들어요.
Because there are many insects, it's hard to move.
Here, '곤충이' is the subject describing the insect's possession of colors.