'vaguely-concluded' originates from the combination of 'vague' and 'conclude'. 'Vague' comes from Latin 'vagus', meaning 'wandering', and 'conclude' comes from Latin 'concludere', meaning 'to shut up, enclose'.

'Vague' changed from the Latin word 'vagus' to the French word 'vague', and eventually became the modern English word 'vague'. 'Conclude' transformed from the Latin 'concludere' to the Old French 'conclure', and eventually became the modern English word 'conclude'.

Initially, 'vague' meant 'wandering', but over time it evolved into its current meaning of 'unclear'. 'Conclude' has largely retained its original meaning of 'to bring to an end'.