unbalanced

[uhn-bal-uhnst]
adjective
1.
not balanced or not properly balanced.
2.
lacking steadiness and soundness of judgment.
3.
mentally disordered; deranged.
4.
(of an account) not adjusted; not brought to an equality of debits and credits.
5.
Football. of or pertaining to an offensive line formation having more than three linemen on one side of the center. Compare balanced ( def 2 ).

Origin:
1640–50; un-1 + balanced


3. disturbed, unsound, irrational.
Dictionary.com Unabridged

unbalance

[uhn-bal-uhns]
verb (used with object), unbalanced, unbalancing.
1.
to throw or put out of balance.
2.
to disorder or derange, as the mind.
noun
3.
unbalanced condition.

Origin:
1580–90; un-2 + balance

unbalanceable, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
unbalance (ʌnˈbæləns)
 
vb
1.  to upset the equilibrium or balance of
2.  to disturb the mental stability of (a person or his mind)
 
n
3.  imbalance or instability

unbalanced (ʌnˈbælənst)
 
adj
1.  lacking balance
2.  irrational or unsound; erratic
3.  mentally disordered or deranged
4.  biased; one-sided: unbalanced reporting
5.  (in double-entry book-keeping) not having total debit balances equal to total credit balances
6.  electronics (of signals or circuitry) not symmetrically disposed about earth or zero reference potential

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

unbalanced
1650, from un- (1) "not" + pp. of balance. Earliest use is in ref. to the mind, judgment, etc. Of material things, it is recorded from 1732.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
Persons under the shock of genuine affliction are not only upset mentally but
  are all unbalanced physically.
And now you're bleating self-pityingly about mentally unbalanced viciousness
  and deplorable rhetoric.
No need to worry if the load was too heavy, or unbalanced.
Unbalanced traffic distribution caused by mixing toll and free roads decreases
  the efficiency of transportation land use.
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