Historical clue formulations

• Hinder — 2026-07-28
• Totally hamper — 2025-05-06
• Impede the progress of — 2024-01-22
• Frustrate — 2022-05-17
• Frustrate — 2021-06-16
• Frustrate — 2017-07-16
• Hogtie — 2016-06-25
• Confound — 2015-10-18
• Block — 2012-07-19
• Block — 2012-06-27
• Thoroughly frustrate — 2010-03-24
• Stonewall, say — 2010-01-06
• Frustrate — 2007-02-09
• Filibuster — 2003-07-04
• Frustrate — 2002-11-11
• Buffalo — 2000-05-13
• Tree — 1999-04-18
• Perplex — 1996-01-28
• Thwart — 1995-08-22
• Block — 1994-10-18