The word 'dangerously-separated' is a compound adjective formed by combining 'dangerously' and 'separated'. 'Dangerously' originates from the word 'danger', which comes from Old French 'dangier', meaning 'power, authority, control', and 'separated' comes from Latin 'separatus', the past participle of 'separare', meaning 'to divide'.

The term 'dangerously-separated' evolved as a descriptive phrase in modern English to emphasize the risk associated with being separated.

Initially, 'dangerously' meant 'in a manner that involves risk', and 'separated' meant 'divided'. Together, they convey a heightened sense of risk due to separation.