1) Cautiously 2) In a secretive manner 3) Secretly 4) Slyly 5) Sneakily 6) Stealthily 7) Surreptitiously 8) With a preference for secrecy Found on https://www.crosswordclues.com/clue/secretively
adverb in a secretive manner; with a preference for secrecy; `the teacher raised a hand to him, slightly and secretively, because he was her favorite` Found on https://www.encyclo.co.uk/local/20974