This is the 541st most frequent Chinese word.
气
"Qi" - vital energy or life force.
In this sentence, '气' is part of the word '空气', which means 'air'. It refers to the literal air or atmosphere around us.
空气清新，让人心情愉悦。
The air is fresh, making people feel happy.
In this sentence, '气' is used as part of the phrase '生气', which means 'to be angry'. It metaphorically represents emotional feelings.
他生气了，因为没有人理解他。
He is angry because no one understands him.
Here, '气' refers to an internal energy or vital force in traditional Chinese medicine and Taoist practices.