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surreptitious

adjective
 
 
/ˌsʌr.əpˈtɪʃ.əs/ US  /ˌsɝː-/

Definition

done secretly, without anyone seeing or knowing: She seemed to be listening to what I was saying, but I couldn't help noticing her surreptitious glances at the clock.Secrecy and privacy surreptitiously
 
 
/-li/ adverb
Joe surreptitiously had a look in the answer book.Secrecy and privacy
surreptitiousness
 
 
/-nəs/ noun [U]
Secrecy and privacy
(Definition of surreptitious adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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