enigma

As a man, Malcolm X was an enigma, transforming himself multiple times in his short life.

Even as he ascends to the top of China’s billionaire class, Zhong remains an enigma.

Box has always been a bit of an enigma for Wall Street, and perhaps for enterprise software in general.

Although the new research goes a long way to dispelling some of the mystery surrounding the tuatara, there is much to learn about these scaly enigmas.

I propose an enigma; only I am not cruel like the Sphinx and will not devour you if you fail to guess.

But he was not thinking of her as the Napoleonic enigma personified.

There was nothing else left to do; after that he would allow the enigma to drop into the abyss of undiscoverable things.

The two men stared at all this, wondering what lay behind it, until on a sudden the enigma became clear to both of them.

She was the spirit of the enigma, the very personification of the Napoleonic sphinx.

She surveyed my whole person: in her eyes I read that they had there found no charm powerful enough to solve the enigma.