'EU-skeptical' originates from the combination of 'EU,' referring to the European Union, and 'skeptical,' which comes from the Greek word 'skeptikos,' meaning 'inquirer' or 'doubter.'

'Skeptical' changed from the Greek word 'skeptikos' to the Latin 'scepticus,' and eventually became the modern English word 'skeptical.'

Initially, 'skeptical' meant 'inquiring or reflective,' but over time it evolved into its current meaning of 'doubtful or questioning.'