dilapidateyoudaoicibaDictYouDict
dilapidate: [16] It is a common misconception that dilapidate means literally ‘fall apart stone by stone’, since the word comes ultimately from Latin lapis ‘stone’ (as in lapis lazuli [14], literally ‘azure stone’). But in fact Latin dīlapidāre meant ‘squander’ (a sense once current in English, but now superseded). It was a compound verb formed from the prefix dis- ‘apart’ and lapidāre ‘throw stones’, and thus originally must have meant literally ‘scatter like stones’, but its only recorded sense is the metaphorical extension ‘throw away or destroy wantonly, squander’.

The application of the word to the destruction of buildings is a piece of later etymologizing.
=> lapis lazuli
blunt (n.)youdaoicibaDictYouDict
street slang for "marijuana and tobacco cigar" (easier to pass around, easier to disguise, and the stimulant in the tobacco enhances the high from the pot) surfaced c. 1993, but is said to have originated among Jamaicans in New York City in the early 1980s; from Phillies Blunt brand cigars; see blunt (adj.), which has been used of certain cigars since 19c.
Users say that the Phillies Blunt brand produces less harsh-tasting or sweeter smoke. The leaf wrapper of a Phillies Blunt is strong enough to hold together through the manipulations of making a blunt. Other brands fall apart. [http://nepenthes.lycaeum.org/Drugs/THC/Smoke/blunts.html]
composure (n.)youdaoicibaDictYouDict
c. 1600, "composition" (also, in early use, with many senses now given to compound), from compose + -ure. Sense of "tranquility, calmness" is first recorded 1660s, from composed "calm" (1620s). For sense, compare colloquial to fall apart "to lose one's composure."