(n.) /ɪnˈsɪn.ɪˌsaɪ.zəˈbɪlɪˌtɪ/ (in-see-nuh-sai-zuh-bee-luh-tee)
That’s not a real word. I don’t think there’s a word that precisely describes this exact concept yet, so I made one myself on the fly after realizing the fact.
in- – not having a quality of
cynic – a person who believes that people are only interested in themselves and are not sincere
-ize – to make, to turn into
-able – having the ability of
-ity – having the quality of
Put together— the quality of not being able to be turned into a cynic.
An incynicizable person is someone who holds an undying, unkillable belief that life is inherently a beautiful blessing and worth putting one’s faith in.