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underground
adjective, adverb (SECRET) /ˌʌn.dəˈɡraʊnd/
/-dɚ-/ Definition
(Definition of underground adjectiveadverb (SECRET) from the Cambridge Advanced Learner's Dictionary & Thesaurus
© Cambridge University Press)
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SMART Thesaurus: Secrecy and privacy
Synonyms and related words:
- anonymity noun
- anonymous adjective
- backroom noun
- backstage adjective, adverb
- be none of sb's business idiom
- covert adjective
- covertly adverb
- coy adjective (SECRET)
- crypto- prefix
- dead men tell no tales idiom
- mum adjective
- my lips are sealed idiom
- off the record idiom
- off-message adverb, adjective
- official secret noun
- top secret adjective
- trade secret noun
- ulterior adjective
- under the table idiom
- under wraps idiom
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