monotonous

英 [mə'nɒt(ə)nəs] 美[mə'nɑtənəs]

• adj. 单调的，无抑扬顿挫的；无变化的

1. sounded or spoken in a tone unvarying in pitch;

"the owl's faint monotonous hooting"

2. tediously repetitious or lacking in variety;

"a humdrum existence; all work and no play"

"nothing is so monotonous as the sea"