rejuvenate

[ri-joo-vuh-neyt]
verb (used with object), rejuvenated, rejuvenating.
1.
to make young again; restore to youthful vigor, appearance, etc.: That vacation has certainly rejuvenated him.
2.
to restore to a former state; make fresh or new again: to rejuvenate an old sofa.
3.
Physical Geography.
a.
to renew the activity, erosive power, etc., of (a stream) by uplift or by removal of a barrier in the stream bed.
b.
to impress again the characters of youthful topography on (a region) by the action of rejuvenated streams.
verb (used without object), rejuvenated, rejuvenating.
4.
to undergo rejuvenation; revive.

Origin:
1800–10; re- + Latin juven(is) young + -ate1

rejuvenation, noun
rejuvenative, adjective
rejuvenator, noun
unrejuvenated, adjective
unrejuvenating, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
rejuvenate (rɪˈdʒuːvɪˌneɪt)
 
vb
1.  to give new youth, restored vitality, or youthful appearance to
2.  (usually passive) geography
 a.  to cause (a river) to begin eroding more vigorously to a new lower base level, usually because of uplift of the land
 b.  to cause (a land surface) to develop youthful features
 
[C19: from re- + Latin juvenis young]
 
rejuve'nation
 
n
 
re'juvenator
 
n

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

rejuvenate
1807, from re- "again" + L. juvenis (see young). Noun rejuvensecence "renewal of youth" is first recorded 1631.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
There are lots of things that can be done to rejuvenate skin.
The idea was to rejuvenate the field and convince biology students that
  taxonomy is still a viable science.
The ingredients in organic bath salts rejuvenate your skin.
How to rejuvenate and transform overgrown, tangled shrubs.
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