1. (adjective) unaware of or indifferent to

• unaffected

2. (adjective) barely able to be perceived

• indiscernible
• undetectable

3. (adjective) unresponsive to stimulation

• senseless

1. (adjective) incapable of physical sensation

• anaesthetic
• anesthetic
• asleep
• benumbed
• numb

2. (adjective) unaware of or indifferent to

• insensitive

3. (adjective) barely able to be perceived

• imperceptible
• unperceivable

4. (adjective) unresponsive to stimulation

• unconscious

1. (adjective) incapable of physical sensation

• incognizant
• unaware
• insensitive
• insensitive
• unconscious

1. (adjective) incapable of physical sensation

• insensibility

2. (adjective) unaware of or indifferent to

• callosity
• callousness
• hardness
• insensibility
• unfeelingness

3. (adjective) unresponsive to stimulation

• insensibility

1. (adjective) incapable of physical sensation

• sensible
• sensitive