Euphony was borrowed from French at the beginning of the 17th century; the French word (euphonie) derives from the Late Latin euphonia, which in turn traces back to the Greek adjective euphōnos, meaning "sweet-voiced" or "musical." Euphōnos was formed by combining the prefix eu- ("good") and phōnē ("voice"). 

Shakespeare's language is a good example of euphony: pleasant, musical sounds in harmony, as with “To-morrow, and to-morrow, and to-morrow / Creeps in this petty pace from day to day.” Use euphony to describe music or poetry. 

Examples of euphony in a sentence: 
He awakened on a warm morning to the euphony of birdsong outside his window. 
We sat on the patiio where we were serenaded by a euphony of crickets. 
Every day at noon, the tower chimes a euphony of bells.
The performers were filled with a euphony of applause.

4 minutes ago, drpaladin said:

Euphony might not be the best first word addressed to those with a quick temper.

It took me a few seconds to get what you meant by that, but euphony is pronounced yoo-fuh-nee, not you phony!     

21 minutes ago, drpaladin said:

I know, but everyone doesn't. 

Now they do!  

Just the facts:

EUPHONY Definition & Meaning - Merriam-Webster