There are big mouth people, and now I'm searching for the term that describes a person who can keep secret with them. Such people don't reveal what all they have in their minds. They are silent, deep, and master in hiding things within them.

I want a term for a neutral person. In other words, that person could be bad or good to you.

Note: this person has nothing to do with country's secrets.

  • "A reliable person", perhaps. "He is a good secret-keeper", maybe. Commented Jan 4, 2019 at 9:28
  • very general it is... @CowperKettle and obviously, I know that!
    – Maulik V
    Commented Jan 4, 2019 at 9:29
  • Discreet is a good word for this. If you can rely on someone's discretion, you know they will keep a secret or deal responsibly with sensitive information. Commented Jan 4, 2019 at 10:07

6 Answers 6


They are RETICENT, one not revealing one's thoughts or feelings readily.

  • She is extremely reticent about her personal affairs.
  • Spot on! Exact sense, exact meaning, exact context!
    – Maulik V
    Commented Jan 7, 2019 at 7:35

More idiomatic terms are tight-lipped and closemouthed. They could be considered antonyms to "big mouthed", and means the same thing as Barid's more formal answer, reticent.

  • 1
    Even closer to an antonym for “big mouthed” is “close mouthed” - they keep their mouth closed (note where the ‘ed’ is though!) Commented Jan 4, 2019 at 21:43
  • @JohnBurger Great suggestion!
    – Tashus
    Commented Jan 7, 2019 at 15:02
  • If you look up the Simpsons character Johnny Tightlips, you'll find many great jokes on this theme.
    – Stuart F
    Commented Jul 6, 2023 at 9:28

I would say that, at least to when it comes to keeping secrets, they are trustworthy:

: worthy of confidence : DEPENDABLE
// a trustworthy guide
// trustworthy information

In other words, it's safe to entrust your secret to them.


In Hindi, such a person is called "राजदार". In English, he is called a "confidant". To stress, you can say a "close confidant".


There are lots of adjectives that might describe such a person... 'discreet' is one of the most commonly used (far more common than 'reticent', for example).

But a term for such a person would have to be a noun, as your antonym of 'big-mouth' is.

A confidante is someone you feel you can rely on to listen to and keep a secret.


A "steel trap" is used colloquially in my region to refer to someone who will not readily reveal confidential information.

  • What region is that?
    – Chenmunka
    Commented Jul 6, 2023 at 12:25
  • Midwestern united states. Animal trapping is common in my area and was a historical economic driver in my area specifically. Commented Jul 8, 2023 at 12:31

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .