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rapidity

 [ruh-pid-i-tee]  

ra·pid·i·ty

   [ruh-pid-i-tee]
noun
a rapid state or quality; quickness; celerity.
Also, rap·id·ness  [rap-id-nis] .

Origin:
1610–20; < Latin rapiditās. See rapid, -ity

Synonyms
swiftness, fleetness. See speed.

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Rapidity is always a great word to know.
So is doohickey. Does it mean:
a gadget; dingus; thingumbob.
a chattering or flighty, light-headed person.
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Collins
World English Dictionary
rapid (ˈræpɪd)
 
—adj
1.  (of an action or movement) performed or occurring during a short interval of time; quick: a rapid transformation
2.  characterized by high speed: rapid movement
3.  acting or moving quickly; fast: a rapid worker
 
[C17: from Latin rapidus tearing away, from rapere to seize; see rape1]
 
'rapidly
 
—adv
 
rapidity
 
—n
 
'rapidness
 
—n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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