mystery
word
Definition
Something that is difficult or impossible to understand, explain, or know completely. It can also mean a story, event, or situation involving something hidden or unknown.
Usage & Nuances
Common in everyday English and in entertainment: a 'mystery novel' or 'mystery series' is about solving a crime or secret. You can also say something 'remains a mystery' when no one knows the answer. 'Secret' is something intentionally hidden; 'mystery' is something unknown or unexplained.
Example Sentences
That old house has an air of mystery about it.
natural
The cause of the fire is still a mystery.
basic
She likes to read mystery books.
basic
Why he left without a word is a mystery to me.
basic
The whole thing is a mystery — nobody knows what really happened.
natural
How he stays so calm under pressure is a complete mystery.
natural