'atypically-separated' originates from the prefix 'a-' meaning 'not' and 'typical' from Greek 'typikos', meaning 'conforming to a type', combined with 'separated' from Latin 'separatus', meaning 'to divide'.

'Atypical' evolved from the Greek 'atypikos' and 'separated' from Latin 'separatus', eventually forming the modern English compound adjective 'atypically-separated'.

Initially, 'atypical' meant 'not conforming to a type', and 'separated' meant 'divided'. Together, they describe something divided in an unusual manner.