Historical clue formulations

• Energizes — 2026-06-05
• Gives a boost, informally — 2022-05-01
• Gives a boost — 2020-06-16
• Gives a boost — 2018-09-05
• Stimulates, informally — 2014-09-23
• Pokes in the rear — 2014-01-13
• Energizes — 2012-07-29
• Spurs — 2010-05-23
• Stimulates, slangily — 2005-01-06
• Quickly increases — 1999-05-24
• Strengthens, with "up" — 1994-02-08