Definitions:

1. Having or showing discernment or good judgment in conduct and especially in speech. NOUN
   • The success of the undercover operation depended largely on the agents' ability to maintain a high level of discreetness.
2. The ability to avoid embarrassment or distress, or to make intelligent decisions, especially in everyday matters. NOUN
   • Her discreetness in handling sensitive information ensured that the negotiations proceeded smoothly without any leaks to the media.

Synonyms:

• circumspection
• delicacy
• discretion
• foresight
• modesty
• propriety
• prudence
• reserve
• sense
• sensibility
• vigilance
• wisdom
• wit