'slowly-constructed' originates from the combination of 'slowly' and 'constructed', where 'slowly' is derived from Old English 'slāwlice', meaning 'in a slow manner', and 'constructed' from Latin 'constructus', meaning 'to build'.

'slowly' changed from Old English 'slāwlice' to the modern English 'slowly', and 'constructed' evolved from Latin 'constructus' through Middle English 'constructen'.

Initially, 'slowly' meant 'in a slow manner', and 'constructed' meant 'to build'. The combined term 'slowly-constructed' retains these meanings, emphasizing the gradual pace of construction.