Wiktionary
vb. 1 (context idiomatic transitive English) To uplift, hearten, inspire or raise the spirits 2 (context idiomatic transitive English) To keep afloat, to act as buoyancy
WordNet
v. make more cheerful [syn: lighten]
make more cheerful [syn: lighten] [ant: weigh down]
keep afloat; "The life vest buoyed him up" [syn: buoy]
Usage examples of "buoy up".
Sun ran a series of basic checks with the equipment she had, then we all trooped back to the Nagini and brought the damaged buoy up to the platform, together with three cases of tools Sun deemed likely to be useful.
If you can pull the buoy up a bit, there's a rope down there with a clip on it.
From there he will buoy up the torpedo, attach it to the baidarka.
Keff's natural exuberance and energy were proving to be just shy of what it took to buoy up an entire crew of aliens through their first experience of long-term space travel.