Intone – To speak in a voice with little rise or fall in pitch
The lecturer spoke in a continuous tone (intone) that didn't rise or fall in pitch and sent all the students to sleep.
Examples of intone in a sentence
The teacher's intoned lessons made it hard to stay interested in anything she said.
Due to his nerves, he would often intone his presentations.
Her intone reading could make even the most exciting books tedious and boring.