Source : Webster's Revised Unabridged Dictionary (1913)

Mellow \Mel"low\, v. t. [imp. & p. p. {Mellowed}; p. pr. & vb.
   n. {Mellowing}.]
   To make mellow. --Shak.

         If the Weather prove frosty to mellow it [the ground],
         they do not plow it again till April.    --Mortimer.

         The fervor of early feeling is tempered and mellowed by
         the ripeness of age.                     --J. C.
                                                  Shairp.

Source : WordNet®

mellowed
     adj 1: having a full and pleasing flavor through proper aging; "a
            mellow port"; "mellowed fruit" [syn: {mellow}]
     2: having attained to kindliness or gentleness through age and
        experience; "mellow wisdom"; "the peace of mellow age"
        [syn: {mellow}]