Dilapidated is an adjective that means decayed or fallen into partial ruin.
Lapis (LAP eese) is the Latin word for stone. By adding the prefix D-I, we get the word for ‘pelt with stones.’ From there, it evolved into a word that means ‘destroyed from stones.’ More recently, it simply means decayed or destroyed — but not necessarily from stones.
I can’t believe Rosemary wasted her money on that old dilapidated building. Purchasing an old decaying property can only pay off if you invest a lot of time and money into repairing it.