monotonous
mo.not.o.nous \m*-'na:t-*n-*s, -'na:t-n*s\ aj [Gk monotonos, fr. mon- + tonos tone] 1: uttered or sounded in one unvarying tone 2: tediously uniform or unvarying - mo.not.o.nous.ly av
Webster's English Dictionarymo.not.o.nous \m*-'na:t-*n-*s, -'na:t-n*s\ aj [Gk monotonos, fr. mon- + tonos tone] 1: uttered or sounded in one unvarying tone 2: tediously uniform or unvarying - mo.not.o.nous.ly av