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The word indigenous is an adjective, a word that describes a noun: indigenous people, indigenous plants, etc.The words sleuth, epiphany, and enigma are nouns.The word sleuth is also a verb.
The use of the word enigma is apparently an enigma to you! Delicious irony!
The Enigma goes by Slug.
Enigma is a complex riddle or puzzle.
"An enigma wrapped in mystery and riddled with controversy" is how UFO's have been described. He/she is an enigma. The location of 'The Lost Dutchman' gold mine remains an enigma.
El código Enigma in Spanish is "the Enigma code" in English.
How about a conundrum? Or an enigma.
Enigma Titanium was created in 2005.
The ISBN of The Great Enigma is 9100103101.
Enigma Motorsport was created in 2008.
Enigma of the Hour was created in 1911.