adjective / noun
religious
rih-LIJ-uhs/rɪˈlɪdʒəs/
Devoted to sacred beliefs or practices.
My grandmother is deeply religious and prays every morning.

Etymology
From religio, religious observance or reverence, the adjective first described devotion and piety. Its meaning broadened from being devout to relating generally to religion, including divine belief and worship.
In context
authentic religious convictions that this would risk insulting the gods
More examples
- The family gathers to celebrate important religious holidays.
- He is religious about taking his daily walk.
- The abbey houses a small community of religious.
Forms
religious · more religious · most religious
religion noun — A system of sacred beliefs and practices.
religiously adverb — With devotion or consistent, careful observance.