mellowness

adjective

1. soft, sweet, and juicy because ripe: said of fruit
2. full-flavored; matured; not acid or bitter: said of wine, etc.
3. full, rich, soft, and pure; not harsh: said of sound, light, color, weather, etc.
4. moist and rich; loamy: said of soil
5. softened and made gentle, understanding, and sympathetic by age and experience
6. Informal genial or convivial, as from drinking liquor

transitive verb, intransitive verb