枯燥 (kū zào): Dull and dry (Adjective) — Meaning & Stroke Order

This book is very boring.

He doesn't find historical research dull at all; on the contrary, he thinks it's fascinating.

If teaching methods are not innovative, the classroom atmosphere will become dull and boring.

His speech was dull and tedious, making the audience drowsy.

Don't complain that the task is uninteresting; try to find some fun in it.