deep faith; devoutness
Refers to sincere, wholehearted religious faith or devotion. Often used in formal or literary contexts.
彼は篤信なクリスチャンとして知られている。
He is known as a devout Christian.
篤信のあまり、毎
Out of deep faith, he offers prayers every day without fail.
Compound of 篤 (deep, sincere) and 信 (faith, belief). The exact historical derivation is uncertain, but the word has been used in formal and religious contexts to express profound devotion.