'unorthodoxly' originates from the prefix 'un-' meaning 'not' and 'orthodox,' which comes from Greek 'orthodoxos,' where 'ortho-' meant 'correct' and 'doxa' meant 'opinion.'

'orthodoxos' transformed into the Late Latin word 'orthodoxus,' and eventually became the modern English word 'orthodox,' with 'unorthodox' forming by adding the prefix 'un-'.

Initially, 'orthodox' meant 'correct opinion,' but 'unorthodox' evolved to mean 'not conforming to established doctrine.'