crypto-believer

rare

(rare) Someone who hides their belief.

Japanese Meaning

自分の信念を隠す人 / 信念をひそかにする者

The new member kept his opinions to himself, revealing he was a crypto-believer only to a trusted friend.

その新しい会員は自分の意見を明かさず、信頼できる友人にだけ自分が隠れ信者であることを打ち明けた。

Sense（1）

(rare) Someone who hides their belief.

crypto-believers

（ plural ）