haven't a clue

Grammar usage guide and real-world examples

This is a direct and common synonym, simply stating a lack of knowledge.

This is a slight variation, replacing "haven't" with "don't have", maintaining the same meaning.

This phrase implies a complete absence of even a vague idea or suspicion.

This uses the adjective form to describe oneself as lacking knowledge.

This intensifies the lack of knowledge with "earthly", emphasizing complete ignorance.

This idiom suggests being uninformed or unaware of something.

This idiom emphasizes a complete lack of understanding or awareness.

This indicates an inability to provide an answer due to lack of information.

This is a colloquial way of saying "I don't know".

This phrase suggests that the speaker has no more knowledge than the person they are talking to.