'impartially-managed' originates from the word 'impartial,' which comes from the Latin 'im-' meaning 'not' and 'partialis' meaning 'partial.' 'Managed' comes from the Latin 'manus' meaning 'hand.'

'impartial' evolved from the Old French 'impartial' and 'managed' from the Old French 'managier,' eventually forming the modern English term 'impartially-managed.'

Initially, 'impartial' meant 'not partial or biased,' and 'managed' meant 'handled or controlled.' The combined term retains these meanings in modern usage.