adj. furtive, secret, clandestine, stealthy, underhand(ed), covert, (on the) sly, secretive, private, concealed, hidden, veiled, Colloq sneaky She stole surreptitious glances at him
SURREPTITIOUS
Meaning of SURREPTITIOUS in English
Oxford thesaurus English vocab. Английский словарь Оксфорд тезаурус. 2012