Definition (for the tiny possibility that someone here doesn't yet know):
>Crypto-Judaism is the secret adherence to Judaism while publicly professing to be of another faith; practitioners are referred to as "crypto-Jews" (origin from Greek kryptos – κρυπτός, 'hidden'). The term is especially applied historically to Spanish Jews who outwardly professed Catholicism, also known as Anusim or Marranos.
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