discreet
The term "discreet" refers to the quality of being careful and prudent in one's actions or speech, especially to avoid causing offense or attracting attention. A discreet person is often mindful of the feelings and privacy of others, choosing their words and actions wisely to maintain confidentiality or respect boundaries.
In everyday situations, being discreet can involve keeping a secret, such as not revealing a friend's personal information. For example, if someone confides in you about a sensitive issue, being discreet means you would not share that information with others, thus demonstrating trustworthiness and respect for their privacy.