aerate
     v 1: expose to fresh air; "aerate your old sneakers" [syn: {air
          out}, {air}]
     2: aerate (sewage) so as to favor the growth of organisms that
        decompose organic matter [syn: {activate}]
     3: impregnate, combine, or supply with oxygen; "oxygenate
        blood" [syn: {oxygenate}, {oxygenize}, {oxygenise}]
Source: WordNet® 2.0