Synonyms for Close-mouthed:

• adj.

  •cautious (adjective)
  • discreet.

• Other synonyms:

  •
  • tightlipped,
  • uncommunicable.
  •
  • incommunicative,
  • Incommunicable.
  •
  • silent.
  •
  • close.
  •Other relevant words:
  • distant,
  • icy,
  • secret,
  • classified,
  • formal,
  • antisocial,
  • noncommittal,
  • dignified,
  • controlled,
  • sounds,
  • sedate,
  • secretive,
  • unresponsive,
  • clandestine,
  • shadowy,
  • ice-cold,
  • detached,
  • close-lipped,
  • speechless,
  • strait-laced,
  • standoffish,
  • frigid,
  • untalkative,
  • restrained,
  • confidential,
  • cool,
  • unforthcoming,
  • unemotional,
  • underground,
  • soft-spoken,
  • undemonstrative,
  • guarded,
  • poker-faced,
  • prim,
  • Inobtrusive,
  • remote,
  • mum,
  • withdrawn,
  • aloof,
  • mute,
  • mysterious,
  • demure,
  • tight-lipped,
  • rigid,
  • surreptitious,
  • taciturn,
  • restraint,
  • unsocial,
  • retiring.