IPA: /ʌnˈnjuːzˌwɜːrði/
KK: /ʌnˈnuzˌwɜrði/
Not important or interesting enough to be reported in the news.
The local event was considered unnewsworthy by the media.
Unnewsworthy → It is formed from "un-" (meaning not) and "newsworthy" (from "news" (from Old English *news*, meaning new information) and "worthy" (from Old English *weorþe, meaning having worth or value)). The word means not having worth or value as news.
Think of 'not' ('un-') and 'having worth' ('worthy') to remember that 'unnewsworthy' means something that is not considered valuable or important as news.