What Does "Why on Earth" Mean?
"Why on Earth" is an English idiom. It is an expression of extreme surprise, disbelief, or curiosity, often used to question the reasoning behind something.Examples in Sentences
Here are three examples of the idiom "why on Earth" used in a sentence:- Why on Earth did you buy such an expensive car? It's beyond my understanding.
- Why on Earth would they paint the house bright pink? It looks outrageous.
- Why on Earth did he choose that remote location for his vacation?

What Is an Idiom?
An idiom is a commonly used expression whose meaning does not relate to the literal meaning of its words. In other words, if you were to translate "Why on Earth" word for word, there is no guarantee the translation would help you to understand the meaning.An idiom often includes a cultural or historical context that makes it difficult for non-native English speakers to understand. A phrase is classified as an idiom when a direct translation of the words does not reveal the meaning. Most idioms rely on shared knowledge or experiences known only to a specific community.
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