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prolong

pro·long [ prə láwng ] (past and past participle pro·longed, present participle pro·long·ing, 3rd person present singular pro·longs)


transitive verb 
Definition:
 
make something last longer: to make something go on longer

[15th century. Directly or via French prolonger< late Latin prolongare "lengthen out" < Latin longus "long"]

pro·lon·ga·tion [ pr lawng gáysh'n ] noun
pro·long·er [ prə láwngər ] noun
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