'assertively-built' originates from the English word 'assertive,' which comes from the Latin word 'assertus,' meaning 'to affirm' or 'to maintain.' The suffix '-ly' is used to form adverbs, and 'built' is derived from the Old English 'byldan,' meaning 'to construct.'

'assertive' changed from the Latin word 'assertus' and eventually became the modern English word 'assertive.' 'Built' evolved from the Old English 'byldan' to the modern English 'built.'

Initially, 'assertive' meant 'to affirm or maintain,' but over time it evolved into its current meaning of 'confident and forceful.'