'unconventionality' originates from the prefix 'un-' meaning 'not' and the word 'conventional,' which comes from Latin 'conventionem,' meaning 'a coming together, agreement.'

'conventionem' transformed into the Old French word 'convention,' and eventually became the modern English word 'conventional.' The prefix 'un-' was added to form 'unconventionality.'

Initially, 'conventionem' meant 'a coming together or agreement,' but over time, 'conventional' evolved to mean 'in accordance with established practices,' and 'unconventionality' as its opposite.