Superlative form of devout: most devout.(adjective)
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Use "devoutest" in a sentence
"A man who never ventured one impious word or deed against the gods we worship, but whose whole language concerning them, and his every act, closely coincided, word for word, and deed for deed, with all we deem distinctive of devoutest piety."
"Never had I felt this scorching flame, I to whom love had appeared only in the form of devoutest worship."
"The visit, his second, was by all accounts a typical trip by a foreign prelate, and even his devoutest biographers depict it as one of no great consequence."