Usage patterns
単調な生活a monotonous life
I'm getting tired of my monotonous life, doing the same things every day.
単調な作業monotonous, repetitive work
It's tough to keep doing monotonous work at the factory all day long.
〈事〉が単調になるfor something to become monotonous
The same melody kept repeating, and the whole song ended up feeling monotonous.
単調さを避けるto avoid monotony
To avoid monotony in the lessons, the teacher incorporated a variety of activities.