aerate (v.)

"cause to mix with carbonic acid or other gas, 1794 (implied in aerated), from aer/aër (used in old science for specific kinds of air, a sense later given to gas (n.1)), from Latin aer (see air (n.1)) + verbal suffix -ate (2). Meaning "expose to air" is from 1799, probably a back-formation from aeration. Related: Aerating.