say it: muh-NAH-tuh-nuhs
monotonous is an adjective meaning "tediously repetitious or lacking in variety". It carries 2 recorded senses.
sounded or spoken in a tone unvarying in pitch
“the owl's faint monotonous hooting”
Definitions, synonyms and semantic relations for monotonous come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.