underoxygenated

adjective2

1. •
   Having insufficient oxygen.

   • This concept assumes that all underoxygenated blood in the arteries comes from a true shunt, a passage through the lungs with no oxygenation. — 1983
2. •
   (figurative) Lacking vitality; lackluster.

   • 'Right now, you look very ... underoxygenated,' Perdu heard Max Jordan's voice say. — 2015