The idiom "to be the apple of someone's eye" means to be someone's favorite person or thing. It is used to describe someone who is cherished and loved deeply by another person.
The origin of this idiom comes from the idea that the pupil of the eye was once thought to be a solid object, like an apple, and that it was the most important part of the eye. Therefore, if someone is the "apple of your eye," they are the most important and cherished person in your life.
You can use this idiom to describe a person who is loved and adored by someone, such as a child who is the apple of their parent's eye, or a spouse who is the apple of their partner's eye. It can also be used to describe a favorite possession or object, such as a car or a pet.
For example, "My daughter is the apple of my eye. I love her more than anything in the world." or "My dog is the apple of my eye. I can't imagine life without him."
• Sarah's son is the apple of her eye; she is always talking about how proud she is of him.
• The charity organization's mission to help disadvantaged children has become the apple of the founder's eye, and she works tirelessly to support it.
• My little sister is the apple of my parents' eye; they always give her everything she wants.
• My best friend's dog is the apple of her eye; she takes him everywhere she goes.
• Despite having many grandchildren, Mary's youngest granddaughter is still the apple of her eye; she always spoils her with gifts.
• After years of hard work, Emily's successful career has become the apple of her eye.