plunger
nounUK /ˈplʌn.dʒər/
US /ˈplʌn.dʒɚ/
A plunger is a tool with a rubber cup that you push down to clear a blocked toilet or sink.
Dad used a plunger to fix the blocked toilet.
OTHER MEANINGS
2. A part in a machine or syringe that moves up and down to push or pull something.
The plunger in the syringe pushed the medicine into the patient.
3. A person or thing that plunges, such as a diver.
The plunger jumped into the pool with a big splash.
4. A heavy weight or piece used to press something down.
The plunger pressed the coffee grounds down in the pot.