Historical clue formulations

• Wither away — 2014-09-01
• Wither — 2011-09-12
• Result of nonuse — 2009-09-05
• Wither — 2007-10-25
• Go downhill — 2007-09-28
• Weaken from disuse — 2006-05-02
• Wither away — 2000-11-21