mellow

slightly and pleasantly intoxicated from alcohol or a drug (especially marijuana)

softened through age or experience

“mellow wisdom”

become more relaxed, easygoing, or genial

“With age, he mellowed”

having a full and pleasing flavor through proper aging

“a mellow port”

unhurried and relaxed

“a mellow conversation”

in a mellow manner

make or grow (more) mellow

“These apples need to mellow a bit more”

soften, make mellow

“Age and experience mellowed him over the years”