IPA: /ˌʌn.rɪˈvaɪzd/
KK: /ʌnˈrɪvaɪzd/
Describing something that has not been changed or updated.
The document was left unrevised, containing outdated information.
Unrevised → It is formed from "un-" (meaning not) and "revised" (from Latin "revisere", meaning to look at again). The word "unrevised" means not looked at again or not edited.
Think of 'not' ('un-') having something 'looked at again' ('revisere') — that's why unrevised means it hasn't been reviewed or edited.