IPA: /ˌʌn.rɪˈstɔːrd/
KK: /ʌnˈrɛstoʊrd/
Not having been repaired or returned to a previous condition.
The unrestored building still shows signs of its former glory.
Unrestored → It is formed from "un-" (meaning not) and "restored" (from Latin "restaurare", meaning to bring back or restore). The word "unrestored" means not brought back to a previous state or condition.
Think of 'not' ('un-') having something 'brought back' ('restored') — that's why unrestored means it hasn't been returned to its former state.