The enigma therefore still defies solution.
Until his death, the answers remained an enigma to him.
The broken vases were painted in a large bold style which remained an enigma till the excavation of the king's tomb.
It was the most perplexing enigma in astronomy.
The principles on which these divisions were made remain an enigma to the present day.
The reason that the source of the noise is such an enigma is that no one ever traced the sound when they heard it.
The crowds of Epicureans were a standing enigma to the adherents of less popular sects.
He did a lot of research so he is not confused by the enigma of the pain that comes with the disease.
Man is a hopeless enigma to himself, until he sees himself in the light of being a human with human failings.
This fact explains a passage which has been a total enigma to every reader up until this time.