IPA: /ˈɒksɪdaɪzə/
KK: /ˈɑksɪˌdaɪzər/
A material that helps another substance to burn by providing oxygen or by removing electrons from it.
Hydrogen peroxide is a common oxidizer used in various chemical reactions.
Oxidizer → It is formed from "oxid" (from Latin "oxydum", meaning acid or sour) and "-izer" (a suffix used to indicate a person or thing that performs a specified action). An oxidizer is a substance that causes or promotes oxidation, often by providing oxygen.
Think of an 'oxid' as something related to acid or sourness, and remember that an 'oxidizer' is a substance that promotes oxidation, often by adding oxygen.