Third person singular present tense: actively promotes or publicly announces a product, service, or event to attract customers or attention.
From the verb advertise with the 'z' variant spelling plus the third-person singular present ending -es. This form would be used in sentences like 'She advertizes her business online.'
The shift from 'advertizes' to 'advertises' shows how American and British English made different spelling choices—we chose 's' in modern times, but historical texts prove both were considered correct.
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