'officially-kept' is a compound word formed from 'officially' and 'kept'. 'Officially' originates from the Latin word 'officialis', meaning 'pertaining to duty', and 'kept' is the past participle of 'keep', which comes from the Old English 'cēpan', meaning 'to seize or hold'.

'Officially' evolved from the Latin 'officialis' through Old French 'official', while 'kept' evolved from Old English 'cēpan'. The combination of these words into 'officially-kept' is a modern English formation.

The term 'officially-kept' has consistently meant 'maintained in an official manner' since its formation.