Meaning

adjective having a pleasant sound

adjective (of speech or dialect) pleasing in sound; not harsh or strident

originFrom euphonical + -ous (suffix forming adjectives denoting possession or presence of a quality, commonly in abundance). Euphonical is derived from euphonic + -al (suffix forming adjectives with the sense ‘of or pertaining to’); with euphonic from euphony + -ic (suffix forming adjectives with the sense ‘of or pertaining to’), and euphony borrowed from French euphonie, from Ancient Greek εὐφωνία…

Etymology from Wiktionary, CC BY-SA 3.0