たんちょう単調tanchou
1.
Describing a state or experience that lacks variety or change, often leading to boredom or a sense of dullness in activities or routines.
2.
Characterizing something that maintains a consistent and unvarying pattern, resulting in a feeling of uniformity and absence of excitement.
3.
Referring to a quality of sound or rhythm that does not contain variation, producing a flat or uninteresting auditory experience.
Example:
この話はちょっと単調だ。