'permanently-constructed' originates from the combination of 'permanent' and 'construct', where 'permanent' comes from Latin 'permanens', meaning 'remaining', and 'construct' from Latin 'construere', meaning 'to build'.

'permanens' transformed into the Old French 'permanent', and 'construere' became the Old French 'construire', eventually forming the modern English words 'permanent' and 'construct'.

Initially, 'permanent' meant 'remaining unchanged', and 'construct' meant 'to build'. Together, they evolved to mean 'built to last indefinitely'.