Time to get a little uncomfortable.
Today's word is: 답답하다
답답하다/답답해 is hard to explain.
The best way to describe it is suffocating, stifling, feeling crowded or pressed upon.
For example, if you're stressed about something, you can feel 답답해. Basically, if there is pressure or weight on you. It can also be if there is a lot of pressure on your heart, like you don't want to hurt someone's feelings or you are feeling trapped by relationships.