Of, relating to, resembling, or befitting a saint.(adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "saintly" in a sentence
"After breakfast, having satisfied himself before the mirror that his dress was faultless, and his expression saintly, he went out and travelled by rail from Sloane Square to West Kensington, whence he walked to Laurel Grove."
""Is that what you call saintly, spending all your time with Lady"
"When I was a baby and toddler, I learned to walk by hanging onto the head and ears of a very patient - one might say "saintly" - basset hound named Rebel."