'atypically-built' originates from the prefix 'a-' meaning 'not' or 'without' and 'typical,' which comes from the Greek word 'typos,' meaning 'model' or 'type.'

'atypically' evolved from the Greek 'atypikos,' and 'built' from the Old English 'byldan,' eventually forming the modern English term 'atypically-built.'

Initially, 'atypical' meant 'not conforming to the type,' and 'built' referred to 'constructed.' Together, they evolved to describe something constructed in a non-standard way.