definition of
derange

[1] #1 derange v. [unbalance] derange mentally, throw out of mental balance; make insane; "The death of his parents unbalanced him". wn

[2] #2 derange v. [perturb, throw out of kilter] throw into great confusion or disorder; "Fundamental Islamicists threaten to perturb the social order in Algeria and Egypt". wn