UNBALANCE
imbalance, instability, unbalance
(noun) a lack of balance or state of disequilibrium; “a hormonal imbalance”
derangement, mental unsoundness, unbalance
(noun) a state of mental disturbance and disorientation
unbalance, derange
(verb) derange mentally, throw out of mental balance; make insane; “The death of his parents unbalanced him”
unbalance
(verb) throw out of balance or equilibrium; “The tax relief unbalanced the budget”; “The prima donna unbalances the smooth work in our department”
Source: WordNet® 3.1
Etymology
Verb
unbalance (third-person singular simple present unbalances, present participle unbalancing, simple past and past participle unbalanced)
(transitive) To cause to be out of balance.
Source: Wiktionary