sibylline
/ˈsɪbəˌlaɪn/
adjective
- Relating to or characteristic of a sibyl; prophetic, oracular.
- The poem had a sibylline quality, full of dark hints about the future.
- The sibylline books were consulted by the ancient Romans in times of crisis.
- Her sibylline remarks left everyone guessing about what would happen next.
- Mysterious or obscure in meaning; enigmatic.
- The instructions were so sibylline that nobody could follow them.
- He gave a sibylline smile and refused to answer the question directly.
- The professor's sibylline explanation only confused the students more.