noun
indiscretion
in-dih-SKRESH-un/ˌɪndɪˈskreʃn/
A lack of good judgment or restraint in what one says or does.
The guest's loud joke is an indiscretion that embarrasses others at the formal dinner.

Etymology
Discretio developed from making distinctions to exercising sound judgment. Indiscretion first named a lack of that judgment, then a particular act or remark that displays it.
In context
you know how easily young men are betrayed into indiscretion; their tempers are more hasty and they have less judgement; make due allowances therefore, and bear with me
More examples
- He regrets the indiscretion of sharing his password with a stranger.
- A moment of indiscretion can damage years of trust.
- The mayor apologizes for several youthful indiscretions.
Forms
indiscretion · indiscretions
indiscreet adjective — Lacking good judgment or proper restraint.
Similar words
- imprudence
- Emphasizes insufficient caution about risks or likely consequences.
- tactlessness
- Focuses on insensitivity to other people's feelings in social situations.
- recklessness
- Implies a stronger disregard for danger or serious consequences.