ESOTERIC
| Date | Clue |
|---|---|
| 2026-01-21 | Like the study of the kabbalah |
| 2025-04-20 | Like much tax law or ancient philosophy |
| 2022-11-21 | Requiring rare knowledge |
| 2019-10-27 | Way out there |
| 2014-09-13 | Like most philosophy dissertations |
| 2010-01-02 | Way out there |
| 2008-11-09 | For initiates only |
| 2006-05-27 | Rarefied |
| 2005-10-30 | Indecipherable |
| 2005-02-09 | Understood by few |
| 2002-11-22 | Shrouded in mystery |
| 2002-11-17 | Incomprehensible |
| 1999-07-13 | Abstruse |
| 1998-09-05 | Secret |
| 1998-04-23 | Abstruse |
| 1997-05-15 | Arcane |
| 1994-08-04 | Arcane |