'conventionally-built' originates from the word 'convention,' which comes from Latin 'conventio,' meaning 'a coming together.' The suffix '-ally' is used to form adverbs from adjectives, and 'built' is the past participle of 'build,' which comes from Old English 'byldan,' meaning 'to construct.'

'convention' evolved from the Latin 'conventio' through Old French 'convention,' and 'build' evolved from Old English 'byldan' to the modern English 'build.'

Initially, 'convention' referred to a gathering or assembly, but over time it evolved to mean adherence to traditional standards, and 'built' has consistently meant 'constructed.'