This is the 11411th most frequent Korean word.
깔보는
"깔보는" means "looking down on" or "belittling."
In this sentence, "깔보는" (kalboneun) is used as an adjective to describe someone's habitual nature of looking down on others.
그는 누군가를 쉽게 깔보는 태도가 있다.
He has an attitude of easily looking down on others.
Here, "깔보는" (kalboneun) modifies the phrase about her tone, implying it gives an impression of condescension.
그녀가 다른 사람들을 깔보는 듯한 말투를 사용했다.
She used a tone of voice that seemed to look down on others.
In this context, "깔보는" (kalboneun) describes the nature of the gaze as condescending or dismissive.