The word 'intentionally-kept' is a compound of 'intentionally' and 'kept'. 'Intentionally' originates from Latin, specifically the word 'intentio', where 'in-' meant 'toward' and 'tendere' meant 'to stretch'. 'Kept' is the past participle of 'keep', which comes from Old English 'cēpan', meaning 'to seize or hold'.

'Intentionally' evolved from the Latin 'intentio' through Old French 'intention', while 'kept' evolved from Old English 'cēpan'. The compound form 'intentionally-kept' is a modern English creation.

Initially, 'intentionally' meant 'with intention or purpose', and 'kept' meant 'held or retained'. The compound 'intentionally-kept' retains these meanings in its modern usage.