What's the adjective for devoutest? Here's the word you're looking for.
Included below are past participle and present participle forms for the
verbs devote and devove which may be used as adjectives within certain contexts.
devout
Devoted to religion or to religious feelings and duties; absorbed in religious exercises; given to devotion; pious; reverent; religious.
“Few espouse political ideologies of any sort, since devout beliefs can impede one's effectiveness as a peacekeeper.”
“We may differ widely as to the future life, but we may all be one in the devout desire to so live here that if we are to live hereafter, we may pass on with joy and not with grief.”
“Jenkins's mother, a devout churchgoer, regularly brought her son to St. Luke's Baptist Church, where the pianist was Ruth Jones, later known as Dinah Washington.”