impeller
Meaning
A rotating component of a pump or compressor that uses centrifugal force to move fluid.
A rotor or similar device used to impel a fluid or gas.
Structure
Usage
The boat's engine failed because a piece of debris damaged the impeller in the cooling pump.
The design of the centrifugal pump's impeller directly affects its efficiency and pressure output.
Engineers selected a stainless steel impeller for its corrosion resistance in the chemical processing application.
Etymology
The word 'impeller' is a modern English formation built directly from Latin components. Its core is the Latin verb pellere, meaning "to drive, push, strike", which descends from the Proto-Indo-European root pel-, carrying the sense of "to thrust, strike, drive". The Latin prefix in- (here assimilated to im- before 'p') adds the meaning "into" or "towards". These elements were combined in English with the agentive suffix '-er', common in words for tools and devices. Thus, an impeller is logically "a thing that drives (fluid) forward or inward", perfectly describing its function of imparting motion to a substance within a machine.
Analysis
- im: A prefix from Latin 'in-', meaning "in, into, towards, on". In this context, it signifies direction or causation. - pel: A root from Latin 'pellere', meaning "to drive, to push". - ler: An agent noun suffix from English '-er', indicating "a person or thing that performs an action".