religiously

Concise Oxford English Dictionary © 2008 Oxford University Press:
religious/rɪˈlɪʤəs/

▶adjective

• 1 relating to or believing in a religion.

  ■ belonging or relating to a monastic order or other group united by their practice of religion.

• 2 treated or regarded with a devotion and scrupulousness appropriate to worship.

▶noun (pl. same) a person bound by monastic vows.

– derivatives
religiously adverb,
religiousness noun.