Exhausters

Part of speech: noun

Definitions

1. mechanisms designed to maximize the expulsion of gases for efficiency
2. elements that help in minimizing the impact of emissions by improving airflow and ventilation
3. Devices that facilitate the removal of exhaust gases to enhance performance

Etymology: "Exhausters" is the plural of "exhauster", a noun built from the verb "exhaust" with the agent suffix "-er", so the term names the things that do the exhausting. Here the sense is mechanical: devices that draw air or gases out of a space, which is why the word is applied to ventilation and emissions-control equipment. The suffix itself is ordinary English, and the "exhaust" it attaches to comes from Latin "exhaurire", meaning to draw out or empty, a sense that the word still carries in its basic meaning of drawing something out until a space is empty.