maturate
     v 1: develop and reach maturity; undergo maturation; "He matured
          fast"; "The child grew fast" [syn: {mature}, {grow}]
     2: grow old or older; "She aged gracefully"; "we age every
        day--what a depressing thought!"; "Young men senesce"
        [syn: {senesce}, {age}, {get on}, {mature}]
     3: ripen and generate pus; "her wounds are festering" [syn: {fester},
         {suppurate}]
Source: WordNet® 2.0