STERILE
| Date | Clue |
|---|---|
| 2025-10-14 | Bacteria-free |
| 2024-11-08 | Beyond clean |
| 2022-06-14 | Lifelessly dull |
| 2021-03-18 | Beyond clean |
| 2014-01-25 | Producing zip |
| 2008-11-22 | Not being productive |
| 2007-10-08 | Germ-free |
| 2006-03-09 | Unfruitful |
| 2005-09-17 | Barren |
| 2004-09-06 | Germless |
| 2003-04-08 | Germ-free |
| 1998-11-26 | Unproductive |
| 1998-07-11 | Unyielding |
| 1997-07-13 | Like a mule |
| 1996-11-30 | Lacking originality |
| 1996-05-06 | Free of germs |
| 1994-10-12 | Hospital-clean |
| 1994-06-26 | More than clean |
| 1994-06-02 | More than dull |
| 1994-04-10 | Germfree |