Related Clues:
- Drills, even when a bit dull
- Induces ennui
- Sleepiness inducers
- Big yawns
- Ear benders
- Calm spells
- Inferior speakers
- Anesthetizes an entire audience
- Rests below lake — one with no water
- Calms fifty sea birds cut off at the head
- Causes yawns
- Killing's reduced by half, initially, then stops for a while
- Many long PowerPoint presentations
- Anesthetizes an entire audience?
- Tedious talkers