Historical clue formulations

• Suffix with defer or insist — 2019-06-23
• An end to depend — 2018-12-16
• Verb-to-noun suffix — 2016-02-18
• Ending to prefer? — 2014-04-04
• Suffix with depend — 2012-01-08
• Suffix with exist — 2011-05-29
• Ending with prefer — 2010-03-19
• Suffix with confer — 2010-03-03
• Suffix with insist — 2007-09-16
• Suffix with exist — 2007-06-20
• Suffix with differ — 2006-11-27
• Ending with defer or refer — 2006-05-14
• Suffix with depend — 2005-03-03
• Suffix with persist — 2003-09-16
• Suffix with persist — 2002-11-26
• Suffix with refer — 2001-10-08
• Suffix with defer — 2000-09-17
• Suffix with exist — 1999-02-09
• Suffix with refer — 1999-01-10
• Noun-making suffix — 1998-12-06
• Suffix with infer — 1998-11-11
• Suffix with differ — 1998-04-08
• Noun-forming suffix — 1997-05-24
• Suffix with differ — 1997-01-12
• Suffix with exist — 1997-01-06
• Depend add-on — 1995-06-01
• Suffix with refer or prefer — 1995-05-11
• Ending with insist or persist — 1995-03-30
• Suffix with defer or confer — 1995-03-19
• Prefer follower — 1994-05-24