Using 'cheapen' implies criticism and suggests lowering dignity or quality, not just value. Their rude behavior really cheapened the elegance of the gala.
Pro Tip 2/3
Emotional Impact
When 'cheapen' is used, it often evokes feelings of offense, as it can attack one’s sense of worth. Selling out to advertisers has cheapened his art in the eyes of his fans.
Pro Tip 3/3
Informal Contexts
'Cheapen' is suitable for casual speech when discussing intangible things like moments or feelings. Using a phone during our dinner date cheapened the romantic atmosphere.