

Solving the enigma took hours of thinking.
A puzzle or riddle that is hard to solve.
The mystery novel was full of enigma.
Her smile was an enigma that intrigued him.
The ancient artifact remained an enigma to the researchers.
solve an enigma
an enigma wrapped in a mystery
an enigma to decipher
mystery
puzzle
riddle
The old painting was an enigma to everyone who saw it.
A person or thing that is mysterious or difficult to understand.
The scientist found the results of the experiment to be an enigma.
Her sudden disappearance was an enigma that puzzled the entire town.
The ancient ruins remain an enigma to archaeologists.
solve an enigma
an enigma wrapped in a mystery
an enigma to someone
mystery
puzzle
riddle