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Verb: lighten  lI-t(u)n
  1. Make more cheerful
    "the conversation lightened me up a bit";
    - lighten up, buoy up
     
  2. Reduce the weight on; make lighter
    "she lightened the load on the tired donkey"
     
  3. Become more cheerful
    "after a glass of wine, he lightened up a bit";
    - lighten up, buoy up
     
  4. Make lighter or brighter
    "The paint will lighten the room";
    - brighten, lighten up
     
  5. Become lighter
    "The room lightened up";
    - lighten up
     
  6. Alleviate or remove (pressure or stress) or make less oppressive
    "lighten the burden of caring for her elderly parents";
    - relieve

Derived forms: lightened, lightens, lightening

Type of: alter, change, cheer, cheer up, chirk up, disburden, mitigate, modify, unburden

Antonym: darken, weigh down