Insusceptibility :: Insusceptibility (n.) Want of susceptibility, or of capacity to feel or perceive..
Insusceptible :: Insusceptible (a.) Not susceptible; not capable of being moved, affected, or impressed; that can not feel, receive, or admit; as, a limb insusceptible of pain; a heart insusceptible of pity; a mind insusceptible to flattery..
Insusceptive :: Insusceptive (a.) Not susceptive or susceptible.