The noun piety means a strong religious belief, or behaviour that is religious or morally correct.
Synonyms are devotion, religiousness, fervor, or reverence.
The word origins from Old French (12th century) piete meaning “piety, faith, pity, compassion”. It also origins from Latin pietatem meaning “dutiful conduct, sense of duty, religiousness, piety, loyalty, patriotism, faithfulness to natural ties”, and in Late Latin meaning “gentleness, kindness, pity”, from pius meaning “kind”.
It’s not enough to love him with just our personal piety.
The exuberance of the church added something to the devotion and piety of the parishioners.
Her face shows a serene look of piety.