IPA: /dɪˈlæpɪˌdeɪt/
KK: /dɪˈlæpɪˌdeɪt/
To cause something to fall into a state of ruin or disrepair, often through neglect or misuse.
The old house was dilapidated after years of neglect.
Past: dilapidated
Past Participle: dilapidated
Dilapidate is formed from "di-" (meaning apart) and "lapidare" (meaning to throw stones or to stone). The word describes the act of causing something to fall apart or to be in ruins, as if it has been pelted with stones.
Think of something being 'thrown apart' ('di-') and 'stoned' ('lapidare') — that's why dilapidate means to cause something to fall into ruin.