'justly-declared' originates from the combination of 'justly,' meaning 'in a fair or rightful manner,' and 'declared,' meaning 'announced or proclaimed.'

'Justly' comes from the Old French 'juste,' and 'declared' from the Latin 'declarare,' meaning 'to make clear.'

Initially, 'justly' meant 'in accordance with justice,' and 'declared' meant 'to make known.' The combined term retains these meanings.