'atypically-used' originates from the prefix 'a-' meaning 'not' and the word 'typical,' which comes from Greek 'typikos,' meaning 'of the nature of a type.'

'typical' changed from the Greek word 'typikos' and eventually became the modern English word 'typical.'

Initially, 'typical' meant 'of the nature of a type,' but over time it evolved into its current meaning of 'usual or common.'