English · Idiom Candidate

why in the world

Proposed by a contributor, not yet supported by evidence.

Both English Tiếng Việt

Meaning · English

used to express surprise or confusion

Nghĩa · Tiếng Việt

Để thể hiện sự ngạc nhiên hoặc bối rối

Machine-translated — suggest a fix

Literally: for what reason on earth

Where it’s used: Used Widespread English

Examples

Why in the world would you do that?

AI-drafted example auto-approved by rule (illustrative, not a corpus attestation)

Sources & notes

Listed in Wiktionary’s “English idioms” category (retrieved 2026-07-29); definition pending editorial review. Definition drafted by AI (@cf/meta/llama-3.3-70b-instruct-fp8-fast) and auto-approved by rule on 2026-07-31; pending editor spot-check.

Equivalents & related

Near equivalent hà cớ gì why the hell; why in the world; why in God's name Tiếng Việt Near equivalent why in God's name Used to express strong frustration or annoyance English · via hà cớ gì Near equivalent in the world existing or happening anywhere English · via hà cớ gì

Lighter cards are two steps away in the meaning graph — equivalents of equivalents, reached via the entry shown on the card.

Common questions

What does “why in the world” mean?

used to express surprise or confusion Literally: for what reason on earth

Is “why in the world” formal or informal?

No register label has been reviewed yet — treat it as neutral and check the usage notes above.

What is the closest equivalent?

“hà cớ gì” (Tiếng Việt) — near equivalent.