To fall into disrepair; to become damaged, deteriorated, or ruined.
From Latin dilapidatus, past participle of dilapidare (to squander, waste), from di- (apart) + lapidare (to pelt with stones, from lapis, stone). The meaning shifted from 'to destroy by throwing stones' to 'to waste or ruin.'
The word's etymology hints at ancient punishment—dilapidation originally meant literal destruction by stone-throwing, which evolved into the metaphorical sense of any kind of ruin or decay we see today.
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