Euphonious
Etymology
From Greek "euphonia," from "eu" ("good, well") plus "phōnē" ("sound, voice"). It literally means "good-sounding," the direct counterpart to cacophonous, and it names sound that the ear finds pleasant.
adjective · /yoo-FOH-nee-us/
Pleasing to the ear; sweet-sounding.
What it names
The word for sound that flows agreeably — a mellow voice, a graceful line of poetry, well-tuned music.
Example
The poem was chosen for its euphonious blend of soft consonants and long vowels.
Related idea
Melodious stresses a pleasing tune or melody; euphonious stresses the pleasant quality of the sounds themselves, spoken words included.