Which of the following words is closest in meaning to “Callow”?

Callow means young and inexperienced.

• Correct answer - inexperienced: it has the same meaning as Callow.
• superficial: shallow - wrong, it does not mean the same as Callow.
• sticky: adhesive - wrong, it does not mean the same as Callow.
• rough: not smooth - wrong, it does not mean the same as Callow.