unseen (adjective) unseen: hidden
Sinonime: concealed, curtained,
dark,
imaginary, imagined, impalpable,
impenetrable,
imperceptible,
inconspicuous,
invisible, lurking, not in sight,
obscure,
occult, out of sight, shrouded, undetected, undiscovered,
unnoticed, unobserved,
unobtrusive, unperceived, unsuspected, veiled
Antonime: open, seen,
visible