persistent

[per-sis-tuhnt, -zis-]
adjective
1.
persisting, especially in spite of opposition, obstacles, discouragement, etc.; persevering: a most annoyingly persistent young man.
2.
lasting or enduring tenaciously: the persistent aroma of verbena; a persistent cough.
3.
constantly repeated; continued: persistent noise.
4.
Biology.
a.
continuing or permanent.
b.
having continuity of phylogenetic characteristics.
5.
Botany. remaining attached beyond the usual time, as flowers, flower parts, or leaves.

Origin:
1820–30; < Latin persistent- (stem of persistēns), present participle of persistere to persist; see -ent

persistently, adverb
nonpersistent, adjective
nonpersistently, adverb


1. indefatigable, pertinacious, tenacious. See stubborn. 3. steady.


3. sporadic.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
persistent (pəˈsɪstənt)
 
adj
1.  showing persistence
2.  incessantly repeated; unrelenting: your persistent questioning
3.  (of plant parts) remaining attached to the plant after the normal time of withering: a fruit surrounded by a persistent perianth
4.  zoology
 a.  (of parts normally present only in young stages) present in the adult: persistent gills in axolotls
 b.  continuing to grow or develop after the normal period of growth: persistent teeth
5.  (of a chemical, esp when used as an insecticide) slow to break down; not easily degradable
 
per'sistently
 
adv

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Etymonline
Word Origin & History

persistent
1826, from persistence or from L. persistentem, prp. of persistere.
Online Etymology Dictionary, © 2010 Douglas Harper
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FOLDOC
Computing Dictionary

persistent definition


persistence

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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Example sentences
My advice for those just starting out in this profession is be persistent.
My nostalgic emotional attachment made this a powerful and persistent model.
But persistent landslides kept the trail closed more often than it was open.
The stillness of the empty house is a persistent voice.
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