What does it mean to "swelter"?

To "swelter" means to suffer from unbearable heat, which captures the essence of being uncomfortably warm or hot, often to the point of distress. This term typically implies an environment that is stifling and oppressive, making it difficult for someone to feel comfortable. The word carries connotations of discomfort and can be associated with situations like hot weather, being in a poorly ventilated room, or enduring heat from a fire.

Understanding this context helps clarify why the choice indicating suffering from unbearable heat accurately defines the term "swelter." The other options, which describe enjoyable or cooling experiences, contrast sharply with the concept of sweltering, reinforcing that the correct answer is focused on discomfort rather than relief or enjoyment.