'conventionally-formed' originates from the word 'convention,' which comes from Latin 'conventio,' meaning 'a coming together.' The suffix '-ally' and 'formed' are added to indicate the manner and result of formation.

'convention' evolved from the Latin 'conventio' through Old French 'convention,' eventually becoming the modern English word 'convention.'

Initially, 'convention' referred to a formal meeting or assembly, but over time it evolved to include the idea of established norms or standards.