prolong

[pruh-lawng, -long]
verb (used with object)
1.
to lengthen out in time; extend the duration of; cause to continue longer: to prolong one's stay abroad.
2.
to make longer in spatial extent: to prolong a line.

Origin:
1375–1425; late Middle English prolongen < Late Latin prōlongāre to lengthen, equivalent to prō- pro-1 + long(us) long1 + -ā- theme vowel + -re infinitive ending

prolongable, adjective
prolongableness, noun
prolongably, adverb
prolonger, noun
prolongment, noun
unprolongable, adjective
unprolonged, adjective
well-prolonged, adjective


1. See lengthen.


1. abbreviate.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
prolong (prəˈlɒŋ)
 
vb
(tr) to lengthen in duration or space; extend
 
[C15: from Late Latin prōlongāre to extend, from Latin pro-1 + longus long]
 
prolongation
 
n
 
pro'longer
 
n
 
pro'longment
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

prolong
1412, from O.Fr. prolonguer (13c.), from L.L. prolongare "to prolong, extend," from L. pro- "forth" + longus "long" (adj.) (see long (adj.)).
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
Because aspirin may prolong bleeding, it should be avoided.
That or they use it to prolong the degree cycle in order to get more
  student--teaching out of their phd.
When they rise, consumers prolong payments and the duration of these securities
  lengthens.
Small chunks cut from a fake fireplace log will prolong the burn.
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