(v) throw into great confusion or disorder, Syn. derange, throw out of kilter, Example:Fundamental Islamicists threaten to perturb the social order in Algeria and Egypt
The Collaborative International Dictionary of English (GCIDE) v.0.53 Collaborative International Dictionary (GCIDE)
n. [ Cf. Gael. & Ir. cealt clothes, Gael. cealltair spear, castle, cause, Prov. E. kilter tool, instrument. Cf. Kilt. ] Regular order or proper condition. Same as kelter, but kilter is the more common spelling in the U. S. Used chiefly in the phrase out of kilter, meaning out of order or irregular in some manner. [ Also spelled kelter. ] [ 1913 Webster +PJC ]
[くるわす, kuruwasu] (v5s) (1) to drive mad; to make insane; (2) to cause a malfunction; to put out of order; to throw out of kilter; (3) to derail (a plan, etc.)