"Zest" and "energy" are often used interchangeably, but there's a subtle yet important distinction between them. "Energy" refers to the power and vigor that allows you to perform physical or mental activities. "Zest," on the other hand, describes a feeling of enthusiasm and excitement, a joyful approach to something. While both relate to vitality, zest is more about a positive attitude, whereas energy is more about physical or mental capacity.

Think of it this way: you might have energy to run a marathon, but you'll need zest to actually enjoy it. You might have the energy to study for a test, but the zest comes from your genuine interest in the subject.

Let's look at some example sentences:

• Energy: "I have so much energy today; I could climb a mountain!" (Meaning: I feel physically strong and capable). Translation: (No translation needed as it is already in English).

• Zest: "She approached the project with such zest; it was infectious!" (Meaning: Her enthusiasm and excitement were contagious). Translation: (No translation needed as it is already in English).

• Energy: "After a good night's sleep, I woke up feeling full of energy." (Meaning: I have a lot of physical and mental strength after sleeping well). Translation: (No translation needed as it is already in English).

• Zest: "He tackled the problem with great zest, finding innovative solutions." (Meaning: He approached the problem with enthusiasm and a creative spirit). Translation: (No translation needed as it is already in English).

• Energy: "Lack of sleep drained all my energy." (Meaning: I have very little physical and mental strength due to lack of sleep). Translation: (No translation needed as it is already in English).

• Zest: "The team lacked zest for the competition, resulting in a poor performance." (Meaning: The team didn't have enthusiasm or excitement for the competition). Translation: (No translation needed as it is already in English).

Understanding the nuances of these two words will significantly improve your English vocabulary and help you express yourself more precisely.

Happy learning!