euphonious

The story

1. Proto-Indo-European · derived from*bʰeh₂-“to say, speak”
2. Ancient Greek · derived fromεὐφωνία
3. French · borrowed fromeuphonie
4. English todayeuphonious

From 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 (euphōnía), from εὐ- (eu-, prefix meaning ‘good, well’) + φωνή (phōnḗ, “sound; (human) voice; discourse, speech”) (from Proto-Indo-European *bʰeh₂- (“to say, speak”)) + -ῐ́ᾱ (-ĭ́ā, suffix forming feminine abstract nouns).

Words from the same roots