'ministerially' originates from Latin (via Late Latin and Old French), specifically the Late Latin word 'ministerialis', where 'minister' meant 'servant' or 'attendant'.

'ministerially' developed from the adjective 'ministerial' (from Late Latin 'ministerialis') in Middle English/early modern English; the adverbial suffix '-ly' was added to form 'ministerially'.

Initially it referred to matters relating to a 'servant' or attendant role; over time it came to mean 'relating to the official duties or functions of a minister' and now denotes actions done in a ministerial (official/routine) manner.