secretly
WordReference English Thesaurus © 2025
Synonyms:
privately, covertly, obscurely, darkly, surreptitiously, furtively, stealthily, clandestinely, slyly, behind one's back, confidentially, in strict confidence, in secret, behind the scenes, on the sly, quietly Collocations, hush-hush, in an underhand way
Antonyms:
openly, obviously Collocations, publicly, blatantly, flagrantly, honestly, clearly Collocations, visibly, candidly, frankly, plainly, shamelessly, legitimately, legally, in plain view, by the book, in public