To me, this word seems to almost describe itself, or at least fall into its own description. Its meaning is that of a sound which is pleasingly smooth or musical to hear. It also has some versatility as an adverb (mellifluously) or as a noun (mellifluousness). It is figuratively something ‘honey-like,’ or the sound of one who is ‘honey-tongued.’ Enjoy!
Her low, mellifluous voice always made me feel better.
I find ‘mellifluous’ to be a mellifluous word.
Certain words just roll mellifluously off the tongue.
She speaks with magnificent mellifluousness and charms her audience completely.
Etymology: Late 15th century, from late Latin mellifluus (from mel ‘honey’ + fluere ‘to flow’).