It was a euphemism for ignorance, or lack of sufficient observation.
It was a euphemism for death among the old comrades.
Bonus points will be awarded for the most ridiculous euphemism.
What is the euphemism for people who do the work properly for which they are paid?
That exclamation of surprise is one of the few euphemisms that avoid the use of the word God.
It appears that we have a new euphemism, "feeling a bit tired".
The phrase has become a euphemism for the erosion of workers' basic rights.
When you begin your search, you'll likely encounter a number of breeders who use the term "adopt" as a euphemism for "purchase", but the two words do have different meanings.
Maybe you think the term is a euphemism for skinny dipping?
In like manner, Sleep came to be used as a euphemism for Death.