# why on Earth

idiom

Source: https://englishreference.com/idiom/why-on-earth
Updated: 2026-08-10

## Meaning

used to add emphasis to "why" when beginning a question.

## Examples

- Why on Earth are you still here?
- The instructions were very clear, so why on Earth did you choose to ignore them?
- Given the overwhelming evidence that the project was doomed to fail, one must ask why on Earth the board decided to approve it.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.