Related Clues

• Wasn't colorful
• Used no inflection, maybe
• Went on and on and ...
• Spoke so as to put people to sleep
• Spoke in a monotone
• Talked on and on
• Talked in a monotone
• Buzzed
• Went on and on and on
• Went (on) monotonously
• Hummed in a dull manner
• Went on and on
• Spoke tediously, with "on"
• Hummed
• Talked monotonously
• Sounded like a didgeridoo
• Sounded like bagpipes
• Risked putting one's students to sleep, say
• Spoke monotonously