buoy up

Verb

• keep afloat
  • The life vest buoyed him up
    

• make more cheerful
  • the conversation lightened me up a bit
    

• become more cheerful
  • after a glass of wine, he lightened up a bit
    

Related words

• Synonyms: 
  buoy , lighten , lighten up
• Antonyms: 
  weigh down , weigh on