Crossword puzzle clue "oxygen is about 21 of it"

Here are the possible solutions for oxygen is about 21 of it clue

Answer
Clue
Relevancy
aer
Clue
Oxygen: Prefix
aerate
Clue
Supply with oxygen
Infuse with oxygen
Supply oxygen to
Supply oxygen through respiration
Supply oxygen
Pump in oxygen
Provide with oxygen
Definition
to put air into

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