What is a good way to remember what euphemism means?

One way could be to know that the word comes from Greek with euphemia meaning good speech (and to be even more precise eu means good and pheme means speech).
First the definition – a euphemism is a word or phrase that is used in place of another word or phrase – the euphemism softens what could be considered a cold hard truth. For instance there are many euphemisms for death. So while someone could say:
My husband died last night
it could be said in a softer way:
My husband fell asleep and never woke up
My husband passed over last night
My husband met St. Peter and the Angelic Choir
etc.
So how to remember that it’s euphemism that is this mode of speech? One way could be to know that the word comes from Greek with euphemia meaning good speech (and to be even more precise eu means good and pheme means speech).
Another way would be to take the link below and have it handy on your phone – it’s the website and has a comprehensive list of said devices for your referencing needs:
http://literarydevices.net/euphemism/