derange (v.) Look up derange at Dictionary.com
1776, "throw into confusion," from French déranger, from Old French desrengier "disarrange, throw into disorder," from des- "do the opposite of" (see dis-) + Old French rengier (Modern French ranger) "to put into line," from reng "line, row," from a Germanic source (see rank (n.)). Mental sense first recorded c.1790.