1. Having a full and pleasing flavor through proper aging; SYN. mellowed.
2. Having attained to kindliness or gentleness through age and experience; SYN. mellowed.
3. Having or suggesting softness and richness in quality; SYN. mellowing.

Causing to melt; becoming melted.

1. Lacking in hardness relatively or comparatively.
2. Metaphorically soft
3. Of sound; relatively low in volume
4. Of speech sounds; characterized by a hissing or hushing sound (as 's' and 'sh').