'unstably-constructed' originates from the combination of 'unstable' and 'constructed'. 'Unstable' comes from Latin 'instabilis', where 'in-' meant 'not' and 'stabilis' meant 'standing firm'. 'Constructed' comes from Latin 'constructus', where 'con-' meant 'together' and 'struere' meant 'to pile up'.

'Unstable' changed from the Latin word 'instabilis' and eventually became the modern English word 'unstable'. 'Constructed' evolved from the Latin 'constructus' through Old French 'construire' and Middle English 'constructen'.

Initially, 'unstable' meant 'not standing firm', and 'constructed' meant 'to pile up together'. Over time, 'unstably-constructed' evolved to mean 'built in a manner lacking stability'.