To unbalance something means to make it unsteady and likely to tip over. Her whole body began to buckle, unbalancing the ladder Don't lean in -- you're unbalancing the horse
Unequal mass distribution on a rotor The mass centerline does not coincide with the rotation or geometric centerline
If something unbalances a relationship, system, or group, it disturbs or upsets it so that it is no longer successful or functioning properly. The interplay between the new politics and the modern media will unbalance the political process and inhibit its workings. = destabilize
throw out of balance or equilibrium; "The tax relief unbalanced the budget"; "The primadonna unbalances the smooth work in our department"
derange mentally, throw out of mental balance; make insane; "The death of his parents unbalanced him"
If you describe someone as unbalanced, you mean that they appear disturbed and upset or they seem to be slightly mad. I knew how unbalanced Paula had been since my uncle Peter died = disturbed
If you describe something such as a report or argument as unbalanced, you think that it is unfair or inaccurate because it emphasizes some things and ignores others. UN officials argued that the report was unbalanced. unbalanced and unfair reporting. = biased balanced