Answer: oxygenate

AnswerCrossword Clue
OXYGENATERefuel, as red blood cells
OXYGENATEEthanol vis- -vis gasoline
OXYGENATETreat with a chemical element.
OXYGENATETreat, as bottled water
oxygenateSupply, treat, charge, or enrich with oxygen
oxygenateto impregnate or treat with oxygen