Historical clue formulations

• Grind, as one's teeth — 2025-05-13
• Grind, as one's teeth — 2024-11-12
• Grind — 2023-02-05
• Grind, as one's teeth — 2022-05-17
• Grind, as teeth — 2021-11-03
• Grind, as the teeth — 2021-05-25
• Grind — 2020-10-17
• Grind, as teeth — 2019-08-05
• Grind — 2019-01-20
• Grind, in a way — 2019-01-10
• Grind, as the teeth — 2017-09-18
• Grind, as the teeth — 2016-06-28
• Grind, as the teeth — 2015-01-05
• Grind — 2014-08-31
• Grind — 2014-04-23
• Grind — 2013-04-28
• Grind — 2012-07-18
• Grind together — 2010-10-10
• Rub together — 2009-06-27
• Grind, as teeth — 2007-01-22
• Grind — 2005-01-29
• Rub together — 2004-11-19
• Grind, as teeth — 2004-06-14
• Grind, as teeth — 2002-12-17
• Grind — 1997-06-15
• Grind — 1994-07-20