"Cool" is a word with many meanings. Its old meaning is used to express a temperature that is a little bit . As the world has changed, the word has had manymeanings. "Cool" can be used to express feelings of interest almost anything. When you see a famous car in the street, maybe you will (say), "It's cool." You may think, "He's so cool," when you see your favorite football player. We all maximize the meaning of "cool". You can use instead of many words such as "new" or "surprising". Here's an interesting story we can use to the way the word is used a teacher asked her students to write about the waterfall they had visited. On student's paper was just the one sentence, "It's cool." Maybe he thought it was the best way to show what he saw and (feel).
But the story also shows a scarcity of words. Without "cool", some people have no (word) to show the same meaning. So it is quite important to keep some credibility. Can you think of many words that make your life as colorful as the word "cool"?