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irrupt

[ih-ruhpt] /ɪˈrʌpt/
verb (used without object)
1.
to break or burst in suddenly.
2.
to manifest violent activity or emotion, as a group of persons.
3.
(of animals) to increase suddenly in numbers through a lessening of the number of deaths.
Origin
1850-1855
1850-55; < Latin irruptus; see irruption
Related forms
unirrupted, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for un irrupted

irrupt

/ɪˈrʌpt/
verb (intransitive)
1.
to enter forcibly or suddenly
2.
(of a plant or animal population) to enter a region suddenly and in very large numbers
3.
(of a population) to increase suddenly and greatly
Derived Forms
irruption, noun
Word Origin
C19: from Latin irrumpere to rush into, invade, from rumpere to break, burst
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 irrupted

irrupt

v.

"to break into," 1855, back-formation from irruption or else from Latin irruptus, past participle of irrumpere (see irruption).

Online Etymology Dictionary, © 2010 Douglas Harper
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