← BackshareGuesssubreptitiously/ˌsʌbrɛpˈtɪʃəsli/adverbIn a secret, stealthy, or underhanded manner.The cat subreptitiously crept toward the bird feeder.He subreptitiously slipped the note into her bag when no one was watching.She subreptitiously copied the answers from her neighbor's test.SynonymscovertlysecretlysneakilyAntonymsopenly