Uniformity or lack of variation in pitch, intonation, or inflection.(noun)
Tedious sameness or repetitiousness: the monotony of daily routine. (noun)
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 "monotony" in a sentence
"[Sidenote: Monotony] (4) Remember that monotony is the curse of labor for both child and adult, but that _monotony cannot exist where new intellectual insights are constantly being given_."
"All she has to break the monotony is the scarce book collection at the horribly deficient community library."
"I've been stuck at my mom's place for just over a month now and the monotony is actually wearing me out and zapping my energy worse than the months before when I was stresses as fuck and didn't see myself graduating at all."