"mellower" in the adjective sense
1. laid-back, mellow
unhurried and relaxed
"a mellow conversation"
2. mellow, mellowed
having a full and pleasing flavor through proper aging
"a mellow port"
"mellowed fruit"
3. mellow, mellowed
softened through age or experience
"mellow wisdom"
"the peace of mellow age"
4. high, mellow
slightly and pleasantly intoxicated from alcohol or a drug (especially marijuana)
Source: WordNet® (An amazing lexical database of English)
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