Pronunciation spelling of any. / Old spelling of any

Something or someone puzzling, mysterious or inexplicable. / A riddle, or a difficult problem.

(historical) A small portable electro-mechanical rotor machine used to encrypt and decrypt secret messages, made famous by Germany in WWII.

Pertaining to an enigma. / Mysterious. / Defying description. / (variant) Enigmatical.

the study of puzzles

(computing, historical) Initialism of Electronic Numerical Integrator and Computer, one of the first electronic digital computers.

(historical) A German device used during World War II to encode strategic messages.

Acting in a manner that suggests an enigma. / Behaving mysteriously or strangely. / Functioning in a way that is unexplainable.

Pertaining to an enigma; enigmatic; mysterious.

(astronomy) A type-LC irregular variable supergiant, visible as a second-magnitude orange star, or telescopically as an apparent triple star, marking the nose of the horse in the northern constellation of Pegasus.