IPA: /ɪmˈpɛl.ər/
KK: /ɪmˈpɛlɚ/
A device or part that pushes or drives something forward, often used in machinery or engines.
The impellor in the pump helps to move the water efficiently.
Impellor is formed from "im-" (meaning into) and "pellere" (meaning to drive or push). The word describes something that drives or pushes into action or motion.
Think of something that 'drives' ('pellere') you 'into' action ('im-') — that's what an impellor does.