The prefix 'un-' originates from Old English, meaning 'not,' combined with 'conventionally,' which comes from Latin 'conventionem,' meaning 'a coming together.' The suffix '-ly' is used to form adverbs. 'Sent' is the past participle of 'send,' from Old English 'sendan.'

'Unconventionally' evolved from the Latin 'conventionem' through Middle English 'convenccioun,' and 'sent' from Old English 'sendan.'

Initially, 'unconventionally' meant 'not in accordance with convention,' and 'sent' meant 'dispatched.' The combined term retains these meanings.