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behave

[bih-heyv] /bɪˈheɪv/
verb (used without object), behaved, behaving.
1.
to act in a particular way; conduct or comport oneself or itself:
The ship behaves well.
2.
to act properly:
Did the child behave?
3.
to act or react under given circumstances:
This plastic behaves strangely under extreme heat or cold.
verb (used with object), behaved, behaving.
4.
to conduct or comport (oneself) in a proper manner:
Sit quietly and behave yourself.
Origin
late Middle English
1400-1450
1400-50; late Middle English behaven (reflexive). See be-, have
Related forms
unbehaving, adjective
well-behaved, adjective
Synonyms
1. perform, acquit oneself, deport oneself.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for be have

behave

/bɪˈheɪv/
verb
1.
(intransitive) to act or function in a specified or usual way
2.
to conduct (oneself) in a specified way he behaved badly towards her
3.
to conduct (oneself) properly or as desired the child behaved himself all day
Word Origin
C15: see be-, have
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for be have
behave
early 15c., from be- intensive prefix + have; the sense is "to have or bear (oneself) in a particular way, comport" (cf. Ger. sich behaben, Fr. se porter). Cognate O.E. compound behabban meant "to contain," though the modern sense of behave could have evolved from behabban via a notion of "self-restraint."
Online Etymology Dictionary, © 2010 Douglas Harper
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