adjective.
Not subject to suffering, pain, or harm.
adjective.
Unfeeling; impassive.
The Century Dictionary and Cyclopedia
Incapable of suffering; insensible to pain or harm.
Not to be moved to passion or sympathy; having or exhibiting no emotion.
the GNU version of the Collaborative International Dictionary of English
adjective.
Incapable of suffering; inaccessible to harm or pain; not to be touched or moved to passion or sympathy; unfeeling, or not showing feeling; without sensation.