surreptitiously◼◼◼(in a surreptitious manner) adverb [UK: ˌsʌ.rəp.ˈtɪ.ʃə.sli] [US: ˌsʌ.rəp.ˈtɪ.ʃə.sli]John snuck out and surreptitiously bought Mary a big bunch of flowers for their wedding anniversary. = John est sorti en douce et a subrepticement acheté un gros bouquet de fleurs à Mary pour leur anniversaire de mariage.
furtively◼◻◻(in a furtive manner) adverb [UK: ˈfɜː.tɪ.vli] [US: ˈfɝː.tɪ.vli]