Deliquesce/ˌdelɪˈkwes/ Definition 1 of 4Pro Tip 1/2Heat or Moisture Focus on situations involving heat or moisture, as these conditions cause deliquescence. The jelly deliquesced in the humid air. Pro Tip 2/2Physical Change Understand 'deliquesce' as a physical change from solid to liquid, not a chemical one. The flavored crystals deliquesced into syrup on the counter.