시원하다(si-won-ha-da, siwonhada)
Expresses a pleasant, refreshing feeling without any sense of stuffiness or discomfort.
When to use
relief from heat, refreshing feeling, good air environment, cool food
The nuance
Use 시원하다 when describing relief from heat, humidity, or stuffiness, expressing a positive sensation.
답답하다(dap-dap-ha-da, dapdaphada)
Describes a stuffy feeling physically or mental discomfort like frustration or being stuck.
When to use
bad air, mental frustration, closed space, uncomfortable situation
The nuance
Use 답답하다 when describing physical suffocation or mental frustration and discomfort.