Un lock

un·lock

[uhn-lok]
verb (used with object)
1.
to undo the lock of (a door, chest, etc.), especially with a key.
2.
to open or release by or as if by undoing a lock.
3.
to open (anything firmly closed or joined): to unlock the jaws.
4.
to lay open; disclose: to unlock the secrets of one's heart.
verb (used without object)
5.
to become unlocked.
00:10
Un lock is always a great word to know.
So is lollapalooza. Does it mean:
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
an extraordinary or unusual thing, person, or event; an exceptional example or instance.

Origin:
1350–1400; Middle English unloken; see un-2, lock1

un·lock·a·ble, adjective
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Based on the Random House Dictionary, © Random House, Inc. 2013.
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World English Dictionary
unlock (ʌnˈlɒk) [Click for IPA pronunciation guide]
 
vb
1.  (tr) to unfasten (a lock, door, etc)
2.  (tr) to open, release, or let loose
3.  (tr) to disclose or provide the key to: unlock a puzzle
4.  (intr) to become unlocked
 
un'lockable
 
adj

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

unlock
c.1400, from un- (2) + lock (v.). Fig. sense is attested from 1531.
Online Etymology Dictionary, © 2010 Douglas Harper
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