'unbrokenly' originates from the word 'unbroken', which is derived from the prefix 'un-' meaning 'not' and the word 'broken', which comes from Old English 'brocen', the past participle of 'brecan', meaning 'to break'.

'unbroken' changed from the Old English word 'brocen' and eventually became the modern English word 'unbroken'.

Initially, it meant 'not broken or fractured', and over time it evolved into its current meaning of 'continuous or uninterrupted'.