mellow // mellows, mellowing, mellowed
 
1 Mellow light is soft and golden.                                                             ADJ
...the mellow sunlight.
 
2 Mellow stone or brick has a pleasant soft colour because it is old.       ATTRIB ADJ
 
3 A mellow sound is smooth and pleasant to listen to.                              ADJ
 
4 If someone mellows, they become more pleasant or relaxed.                 ERG VB
He mellowed considerably as he got older.
He says that age should have mellowed me.