Use 'euphemistically' to soften harsh truths or criticism in a conversation or writing. He's, euphemistically speaking, between jobs right now.
Pro Tip 2/3
Cultural Sensitivity
Euphemisms vary across cultures; what's mild in one may be offensive in another. She referred to the layoffs, euphemistically, as 'strategic downsizing'.
Pro Tip 3/3
Avoiding Rudeness
Use 'euphemistically' in situations where being direct might come off as rude or insensitive. He's, to put it euphemistically, not the sharpest tool in the shed.