The quality or state of being heterodox; the degree to which something departs from accepted or official beliefs.
Heterodox plus the noun suffix -ness, which comes from Old English and Germanic roots. The -ness ending creates abstract nouns that describe qualities or conditions.
English loves stacking suffixes like building blocks—heterodox becomes heterodoxness, which becomes heterodoxnesses, and theoretically you could keep going forever, though speakers stop when it sounds ridiculous.
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