IPA: /dɪˈmæɡnəˌtaɪzər/
KK: /dɪˈmæɡnəˌtaɪzər/
A device that removes magnetism from objects or materials.
The technician used a demagnetizer to ensure the equipment was free of magnetic interference.
Demagnetizer → It is formed from "de-" (meaning down or away) and "magnet" (from Latin "magnes", meaning magnet) and "-izer" (meaning one who or that which). The word "demagnetizer" refers to something that removes or takes away the magnetic properties of an object.
Think of 'removing' ('de-') the 'magnetic' properties ('magnet') — that's why a demagnetizer is something that takes away magnetism.