1. (

• monotony ,
• humdrum ,
• sameness ,

) the quality of wearisome constancy, routine, and lack of variety; "he had never grown accustomed to the monotony of his work"; "he was sick of the humdrum of his fellow prisoners"; "he hated the sameness of the food the college served" ;

2. (

• monotony ,

) constancy of tone or pitch or inflection ;