insentient (adj.)

• abiotic
• asleep
• azoic
• benumbed
• callous
• dead
• deadened
• dull
• dumb
• exanimate
• impassive
• inanimate
• inert
• insensate
• insensible
• insensitive
• lifeless
• mute
• nonconscious
• nonliving
• numb
• numbed
• obdurate
• obtuse
• senseless
• soulless
• thick-skinned
• unanimated
• unconscious
• unfeeling
• unimpressionable
• unperceptive
• unresponsive
• unsusceptible