Meanings
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1
noun
a device with blades that rotates to drive an aircraft or vessel through air or water
The boat's propeller became tangled in a length of rope.
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2
noun
a person or thing that causes something to move forward
The rear wheel acts as the vehicle's main propeller.
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Etymology
Formed from propel + the agent suffix -er. Propel comes from Latin propellere, meaning to drive forward, from pro- (forward) + pellere (to drive or push).