closemouthed
clo·se·mout·hed
adjective
1.
inclined to secrecy or reticence about divulging information
- “although they knew her whereabouts her friends kept close about it”
Origin
From close + mouthed.
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.