He repeated his phrases over and over again, varying them and surrounding them with his monotonous voice.
I had hardly any patience with the serious work of life which, now that it stood between me and my desire, seemed to me child’s play, ugly monotonous child’s play.
He would love that, he said, better than anything in this world; and his voice, as he led me monotonously through the mystery, grew almost affectionate and seemed to plead with me that I should understand him.
There are no more uses of "monotonous" in the book.
Show samples from other sources
The cafeteria food is good, but it gets monotonous after a while.