Synonyms for Under one's hat:

• adj.

  • private
  • behind the scenes
  ,
  • close to one's chest
  ,
  • nonpublic
  ,
  • not open
  ,
  • non-public
  .

• Other relevant words:

• confidential
.
• Other relevant words (adjective):
• not for publication
,
• private
,
• privileged
,
• top secret
.
• Other relevant words (adverb):
• buttoned up
,
• secret
,
• under wraps
.

What are the hypernyms for Under one's hat?

• Other hypernyms:

  concealment, confidentiality, privateness, reserve, reticence, secrecy.