sceptic
Sceptic (noun) means a person who is not easily convinced and questions claims or ideas that others accept without proof. Example: “She remained a sceptic about the diet's supposed benefits.”
How to use sceptic
Learner’s notesIn plain EnglishA sceptic is someone who needs solid proof before believing a claim.
Sceptic is chiefly a British spelling; skeptic is the more widely used form outside the UK.
Watch the spelling carefully, since sceptic and septic differ by only one letter but mean completely different things.
Trace the full origin ↓Fill the gap
Can you complete this real example?
She remained a _____ about the diet's supposed benefits.
Etymology
Sceptic is simply the spelling used chiefly in the UK for the same word spelled skeptic elsewhere.