Synonyms of imperceivable

1 Syllable
numb, cold
2 Syllables
hidden, torpid, gradual
3 Syllables
oblivious, unmindful, unconscious, unfeeling
4 Syllables
obdurate, insensible, unaware, insensate
5 Syllables
unimpressible, unsusceptible, inanimate, imperceptible, inappreciable
6 Syllables
unintelligible