**Enigma** (загадка, тайна, нечто загадочное) is a word that can be used in various contexts. Here are some examples of its usage:
1. The ancient Egyptian pyramids remain an **enigma** to archaeologists and historians, as their true purpose and construction methods are still not fully understood.
2. His mysterious disappearance without a trace has turned him into an **enigma** for the public, with many theories and speculations surrounding his whereabouts.
3. The Mona Lisa, with its mysterious smile, has been an **enigma** for centuries, inspiring countless interpretations and analyses by art historians and critics.
4. The sudden disappearance of the airline flight, leaving no trace, has become an **enigma** that continues to baffle investigators and the public alike.
5. The writer's latest novel, filled with cryptic symbols and metaphors, left readers puzzled and seeking to unravel its **enigmatic** meaning.
6. The disappearance of the ancient civilization, leaving behind only ruins and cryptic inscriptions, is an **enigma** that has captivated historians for generations.
7. The artist's use of abstract symbols and colors in his paintings creates an **enigmatic** atmosphere, inviting viewers to interpret and decipher hidden meanings.
8. The disappearance of the famous actor, without any explanation or clues, has turned him into an **enigma**, with fans and media speculating about his whereabouts and possible reasons for disappearing.
9. The ancient manuscript, written in an unknown language, has remained an **enigma** for linguists and scholars, unable to decipher its meaning.
10. The sudden and mysterious death of the wealthy businessman, leaving no will or heirs, has become an **enigma** that is still being investigated by the authorities.