adjective
discreet
dih-SKREET/dɪˈskriːt/
Careful not to cause embarrassment or attract unwanted attention.
The host makes a discreet comment about the guest's loose button.

Etymology
Separating or distinguishing led to the idea of discernment and sound judgment. That judgment connects the roots to being prudent and tactful, especially in avoiding mistakes or embarrassment.
In context
his inability to keep his drinking problem discreet, was a source of national embarrassment.
More examples
- She kept the conversation discreet.
- A discreet reminder saved him embarrassment.
- They asked for a discreet investigation.
Forms
discreet · discreeter · discreetest
discreetly adverb — without attracting unwanted attention
discretion noun — careful judgment about what to reveal
Similar words
- tactful
- Emphasizes avoiding offense in dealing with people.
- unobtrusive
- Emphasizes not attracting attention.