'interdict' originates from Latin, specifically the word 'interdictum' (past participle of 'interdicere'), where 'inter-' meant 'between' and 'dicere' meant 'to say' or 'to declare'.

'interdict' changed from Latin 'interdicere' / 'interdictum' to Old French 'interdire' and then entered Middle English as 'interdict', eventually becoming the modern English word 'interdict'.

Initially it meant 'to say or declare between' (literally), and in Late Latin came to mean 'to forbid by declaration'; over time it evolved into the modern sense of 'an authoritative prohibition' or 'the act of forbidding'.