'unbreakably' originates from the English word 'unbreakable,' where 'un-' is a prefix meaning 'not,' and 'breakable' means 'capable of being broken.'

'unbreakable' changed from the Old English word 'brecan,' meaning 'to break,' and eventually became the modern English word 'unbreakable.'

Initially, it meant 'not capable of being broken,' and this meaning has largely remained the same in modern usage.