What is the meaning of quicken?

verb

• Move faster.
  • usage: "The car accelerated"
  • synonyms: accelerate, speed up, speed
• Make keen or more acute.
  • usage: "whet my appetite"
  • synonyms: whet
• Give life or energy to.
  • usage: "The cold water invigorated him"
  • synonyms: invigorate
• Show signs of life.
  • usage: "the fetus quickened"
• Give new life or energy to.
  • usage: "A hot soup will revive me"; "This will renovate my spirits"; "This treatment repaired my health"
  • synonyms: animate, recreate, reanimate, revive, renovate, repair, vivify, revivify