'disorganized' originates from the prefix 'dis-' meaning 'not' or 'opposite of' and the word 'organize', which comes from the Greek 'organon' meaning 'tool' or 'instrument'.

'disorganized' evolved from the Middle English 'organisen', which was derived from the Old French 'organiser', and eventually became the modern English word 'disorganized'.

Initially, it meant 'to disrupt the order', but over time it evolved into its current meaning of 'lacking order or methodical arrangement'.