IPA: /ˈaɪənaɪzə/
KK: /ˈaɪənˌaɪzər/
A device that produces ions, often used to purify air or reduce static electricity.
The ioniser helped to improve the air quality in the room.
Ioniser → It is formed from "ion" (from Greek "ion", meaning going) and "-iser" (a suffix used to indicate a person or thing that performs a specific action). The word "ioniser" refers to a device that causes ions to form or to be produced.
Think of the Greek word for 'going' ('ion') to remember that an ioniser is a device that helps create ions.