Suggestive of or resembling sleep: a slumberous torpor. (adjective)
Causing or inducing sleep; soporific.(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 "slumberous" in a sentence
"We are suffering in Britain, I will not say from a decay of patriotism, but from what might be described as a slumberous condition of patriotism today."
"However, we're not here to Taser these slumberous baseball icons."
"A wicked glow lit a stare that lingered too long on me, a slow, slumberous perusal that made my mouth go dry."