mellifluous
definition
having a smooth, flowing sound that is sweet and pleasant to hear
example
Her mellifluous voice captivated everyone in the audience, making even the toughest critics nod in appreciation.
synonyms
harmoniousmelodiousdulcet
word origin — from Latin 'mellifluus', from 'mel' meaning 'honey' and 'fluere' meaning 'to flow'