← BackshareGuesssurreptitious/ˌsɜrəpˈtɪʃəs/adjectiveDone in a secret or stealthy way to avoid being noticed.He took a surreptitious glance at his phone during the exam.They exchanged surreptitious smiles across the crowded room.The cat made a surreptitious move toward the bird feeder.SynonymssecretstealthycovertAntonymsopenobvious