buoy up

verb2

1. •
   To keep afloat; to provide with buoyancy.
2. •
   (figurative) To uplift, hearten, inspire, or raise the spirits of.

   • With this training complete, and the crews of his cruisers and destroyers somewhat buoyed up by the experience, he then headed into the seas around Guadalcanal on the 9th[…] — 2020