become more cheerful;
"after a glass of wine, he lightened up a bit"
make more cheerful;
"the conversation lightened me up a bit"
"The life vest buoyed him up"
- Share prices were buoyed up by hopes of an end to the recession.
- The raft was buoyed up by empty petrol cans.
- We felt buoyed up by the good news.
- buoy up 使浮起, 使不下沉,...