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prolong

[pruh-lawng, -long] /prəˈlɔŋ, -ˈlɒŋ/
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
late Middle English
1375-1425
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
Related forms
prolongable, adjective
prolongableness, noun
prolongably, adverb
prolonger, noun
prolongment, noun
unprolongable, adjective
unprolonged, adjective
well-prolonged, adjective
Synonyms
1. See lengthen.
Antonyms
1. abbreviate.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for un prolongable

prolong

/prəˈlɒŋ/
verb
1.
(transitive) to lengthen in duration or space; extend
Derived Forms
prolongation (ˌprəʊlɒŋˈɡeɪʃən) noun
prolonger, noun
prolongment, noun
Word Origin
C15: from Late Latin prōlongāre to extend, from Latin pro-1 + longus long
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for un prolongable
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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