1. By religion
   "religiously inspired art"
   - sacredly 
2. With extreme conscientiousness
   "he came religiously every morning at 8 o'clock"
   - scrupulously, conscientiously

See also: religious

• unaccountably
• unaccounted
• unaccounted for
• unaccredited
• unaccustomed
• unachievable
• unachievably
• unacknowledged
• unacquainted
• unacquainted with
• unacquisitive
• unactable
• unadaptability
• unadaptable
• unadapted
• unaddicted
• unaddressed
• unadjustable
• unadjusted
• unadmonished
• unadoptable
• unadorned
• unadulterated
• unadventurous
• unadvisable