'safely-constructed' originates from the combination of 'safe' and 'construct,' where 'safe' meant 'free from harm' and 'construct' meant 'to build or form by putting together parts.'

'safely-constructed' changed from the Old English word 'sæf' meaning 'uninjured' and the Latin word 'constructus' meaning 'to heap up' and eventually became the modern English word 'safely-constructed'.

Initially, it meant 'built in a way that prevents harm,' and this meaning has largely remained the same in modern usage.