This is the 7035th most frequent Spanish word.
enigma
A puzzling or mysterious situation, person, or thing.
In this sentence, 'enigma' is used as a noun referring to a mystery or puzzle related to the painting.
El enigma del cuadro dejó a todos los espectadores fascinados.
The enigma of the painting left all the spectators fascinated.
Here, 'enigma' is used as a noun concretely referring to a challenging problem or puzzle to be solved.
Resolver este enigma requiere mucha paciencia y lógica.
Solving this enigma requires a lot of patience and logic.
In this context, 'enigma' denotes an abstract characteristic or quality of her personality that is mysterious or hard to understand.