indefectibility means the quality of being indefectible. Lexicurio rates it Sui generis — a strength score of 87 out of 100.
Why “indefectibility” is a great word
INDEFECTIBILITY — [Noun] The quality of being incapable of failure, decay, or defect. Formed within English from the adjective 'indefectible' (from Latin 'in-' ("not") + 'defectibilis' ("liable to fail")) + the noun-forming suffix '-ity'. Unlike "infallibility," which denotes an inability to err in judgment, or "imperfection," its direct, flawed opposite, indefectibility is an ontological stamina, an immunity to cessation. It is the diamond that does not scratch, the institution that outlasts its critics, the vow that holds a thing whole against the world's pull toward ruin—a steadfastness so total it becomes a testament to an essence that cannot be undone.
Etymology
Compare French indéfectibilité.
noun
- The quality of being indefectible.“eternity and indefectibility”