Noun: enigma i'nig-mu or e'nig-mu
- Something that baffles understanding and cannot be explained
"The disappearance remained an enigma for decades";
- mystery, secret, closed book
- A difficult problem
"The ethical enigma had no easy solution";
- riddle, conundrum, brain-teaser
Derived forms: enigmas
Type of: perplexity, problem
Encyclopedia: Enigma, Georgia