dis ‧ re ‧ pair /ˌdɪsrɪˈpeə $ -ˈper/ BrE AmE noun [uncountable]
[ Word Family: noun : ↑ repair , ↑ disrepair ; adjective : ↑ repairable , ↑ irreparable ; verb : ↑ repair ; adverb : ↑ irreparably ]
buildings, roads etc that are in disrepair are in bad condition because they have not been cared for:
buildings allowed to fall into disrepair
The castle is in a state of disrepair.