'perpetually-kept' originates from the combination of 'perpetual' and 'kept', where 'perpetual' comes from Latin 'perpetuus', meaning 'continuous', and 'kept' is the past participle of 'keep', meaning 'to maintain'.

'perpetual' changed from the Latin word 'perpetuus' and eventually became the modern English word 'perpetual'. 'Kept' is derived from the Old English 'cepan', meaning 'to seize or hold'.

Initially, 'perpetual' meant 'continuous or everlasting', and 'kept' meant 'maintained or preserved'. Together, they convey the idea of something continuously maintained.