'metal-constructed' is a modern English compound from the words 'metal' and 'construct(ed)'. 'metal' originates from Latin 'metallum' (via Old French 'metal'), where 'metallum' meant 'mine' or 'metal'; 'construct' originates from Latin 'construere', where 'con-' meant 'together' and 'struere' meant 'to pile up or build'.

'metal' entered English via Old French 'metal' from Latin 'metallum'; 'construct' came from Latin 'construere' through Old French 'construire' and Middle English before forming modern derivatives. These elements were combined in modern English to form the compound 'metal-constructed'.

Originally the components meant 'metal' (a metal substance) and 'construct' (to build); combined in modern usage they specifically denote something 'built of metal' or 'made from metal'.