Noun

• S: (n) imbalance, instability, unbalance (a lack of balance or state of disequilibrium) "a hormonal imbalance"
• S: (n) derangement, mental unsoundness, unbalance (a state of mental disturbance and disorientation)

Verb

• S: (v) unbalance (throw out of balance or equilibrium) "The tax relief unbalanced the budget"; "The prima donna unbalances the smooth work in our department"
• S: (v) unbalance, derange (derange mentally, throw out of mental balance; make insane) "The death of his parents unbalanced him"