Verb
To bring into a condition of decay or partial ruin, by misuse or through neglect; to destroy the fairness and good condition of; -- said of a building.
To impair by waste and abuse; to squander.
To get out of repair; to fall into partial ruin; to become decayed; as, the church was suffered to dilapidate.
Source: Webster's dictionaryThe unoccupied house started to decay Source: Internet