indiscernible
I
adjective
camouflaged, concealed, delitescent, disguised, evanescent, hidden, impalpable, imperceptible, inconspicuous, indistinguishable, invisible, screened, unapparent, unbeholdable, undiscoverable, unnoticeable, unperceivable, unrecognizable, unregarded, unseeable, veiled
II
index
blind (concealed), inconspicuous, inscrutable, intangible, latent, obscure (faint)
Burton's Legal Thesaurus.
William C. Burton.
2006