lacking in variety and interest; tedious

एकरस

English Usage: The lecture was so monotonous that many students fell asleep.

Hindi Usage: व्याख्यान इतना एकरस था कि कई छात्र सो गए।

the quality of being monotonous

एकरसता

English Usage: The monotonousness of the work made it hard to stay focused.

Hindi Usage: काम की एकरसता के कारण ध्यान केंद्रित करना मुश्किल हो गया।